My first reaction is to think they're amateurs. It's the type of mistake made by people who don't use acrobat much. I remember a thread on Nostr asking for help to actually edit the JPEG scan rather than just drop an object on top to redact. Then I start wondering whether it was an accidentally on purpose moment. Plausible deniability. I guess we'll have to wait to see who it all implicates. I'm sure they were under immense pressure to bury it all.