This sounds like this has been done deliberately. Was the PDF document created by the Official Wedding Photographer by any chance? The PDF being used to get people to make their selection and pay for prints they require?
Have you tried the PDF XChange snapshot Tool? (Camera Icon) I`m guessing that would be covered by the copying not allowed. If so the only way I can think of is to grab a screenshot of each one and either paste into a Word document or save as a bitmap and convert to a JPG.