Post only text or link only to text, please.
PDF has code-execution capabilities and has had the occasional exploit, and I’m not presently inclined to use a network-isolated guest or a text-extraction tool to read what should be text.
If there’s sketchy stuff here, wipe and re-install.
Documents and preferences are usually safe to copy over into the new environment, with apps re-downloaded from known-good sources.
Change all passwords, change the passwords in the password-recovery paths, social media passwords, check your trusted telephone numbers, revoke any unrecognized app approvals, enable two-factor authentication, etc.
Check the other devices and the other connected hardware on your desk and on your local network for compromises, particularly your router and your network-connected printers, and upgrade all of that to current firmware, and seriously consider resetting and reconfiguring the router.
Get extra backups going, preferably with a rotating subset of these disconnected except during use. I’d also be seriously tempted to do a 64-bit app review and upgrade to Catalina, as Apple has further hardened that.