In Datarama, go to the Reference Criteria tab. In the Attachments section, select "References with attachments". Next, go to the Reference Display Options tab. In the Attachments section select "Display attachments".
Click Run Report. This will produce a report showing the references that have PDF attachments. Beside each RefID in the report, you will see the PDF link.
At the very bottom of the report is an option to Download All Attachments. Click this button to download the PDFs.