We also get following exception during that PDF file to ODT conversion by using Aspose.Words for .NET API:
Message=The file cannot be opened. It might have unsupported format or be corrupted.
Inner Exception 1:
InvalidOperationException: Pdf corrupt.
Inner Exception 2:
InvalidOperationException: Can't receive the results.
We have logged this problem in our issue tracking system with ID WORDSNET-21869. We will further look into the details of this problem and will keep you updated on the status of correction. We apologize for your inconvenience.