There's potentially a lot of files attached and printed out in this fashion.

The search on the DOJ website (which we shouldn't trust), given the query: "Content-Type: application/pdf; name=", yields maybe a half dozen or so similarly printed BASE64 attachments.

There's probably lots of images as well attached in the same way (probably mostly junk). I deleted all my archived copies recently once I learned about how not-quite-redacted they were. I will leave that exercise to someone else.