It looks like the pdf is inserted as a file, and not as a picture. So export the field contents and import it as a picture would solve it.
Hope that helps,
Ruben van den Boogaard
Unfortunately, Ruben has hit upon a limitation with the FMP12 interactive fields. The file needs to be inserted in an interactive field, and those didn't exist before FMP12, so the PDF files need to be reinserted in 12 to assure interactivity. Just changing older container field settings doesn't necessarily fix field contents entered in earlier FMP7 file formats.