Azure WebJob with Powershell Script to upload file to Azure Blob storage

I am trying to run powershell script as Azure Web Job (simple one that comes with WebApps) that is responsible for creating PDF file and uploading that file to Azure Blob Storage. When file is successfully created there is an error during file upload using following commands:

$pdfFileName = $reportId + ".pdf";
$storageAccountName = "MY-STORE"
$storageAccountKey = "MY-KEY"
$containerName = "_MY_CONTAINER"
$fullFileName = $PSScriptRoot + "\" + $pdfFileName

$ctx = New-AzureStorageContext -StorageAccountName $storageAccountName -StorageAccountKey $storageAccountKey
Set-AzureStorageBlobContent -File "$fullFileName" -Container $containerName -Blob $pdfFileName -Context $ctx -Force

As a result I have following message that is displayed in Azure Web Jobs logs (in Kudu portal).

[11/15/2016 15:20:24 > 89499f: ERR ] Set-AzureStorageBlobContent : Win32 internal error "The handle is invalid" 0x6 
[11/15/2016 15:20:24 > 89499f: ERR ] occurred while reading the console output buffer. Contact Microsoft Customer 
[11/15/2016 15:20:24 > 89499f: ERR ] Support Services.
[11/15/2016 15:20:24 > 89499f: ERR ] At 
[11/15/2016 15:20:24 > 89499f: ERR ] D:\local\Temp\jobs\triggered\ddd\orgmoz1g.dqi\generateAndUploadReports.ps1:53 
[11/15/2016 15:20:24 > 89499f: ERR ] char:3
[11/15/2016 15:20:24 > 89499f: ERR ] +      Set-AzureStorageBlobContent -File $fullFileName -Container 
[11/15/2016 15:20:24 > 89499f: ERR ] $containerName -Blo ...
[11/15/2016 15:20:24 > 89499f: ERR ] +    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[11/15/2016 15:20:24 > 89499f: ERR ] ~~~~~~
[11/15/2016 15:20:24 > 89499f: ERR ]     + CategoryInfo          : ReadError: (:) [Set-AzureStorageBlobContent], Ho 
[11/15/2016 15:20:24 > 89499f: ERR ]    stException
[11/15/2016 15:20:24 > 89499f: ERR ]     + FullyQualifiedErrorId : ReadConsoleOutput,Microsoft.WindowsAzure.Command 
[11/15/2016 15:20:24 > 89499f: ERR ]    s.Storage.Blob.SetAzureBlobContentCommand

Same script works correctly on my local machine. What is more when I created webjob just to list available modules using Get-Module -ListAvailable i received modules with following ones as well.

    ...
[11/15/2016 15:40:36 > 89499f: INFO] ModuleType Version    Name                                ExportedCommands     
[11/15/2016 15:40:36 > 89499f: INFO] ---------- -------    ----                                ----------------     
[11/15/2016 15:40:36 > 89499f: INFO] Manifest   1.4.0      Azure                               {Get-AzureAutomati...
...
[11/15/2016 15:40:36 > 89499f: INFO] ModuleType Version    Name                                ExportedCommands     
[11/15/2016 15:40:36 > 89499f: INFO] ---------- -------    ----                                ----------------     
[11/15/2016 15:40:36 > 89499f: INFO] Manifest   1.1.2      Azure.Storage                       {Get-AzureStorageB...
...