So, I committed a cardinal sin, and clicked on 2 pdf files that appeared to have come from PayPal. I know, I should have known better. It was only after the fact that I noticed the bogus email addresses. I disconnected the PC from my network, and, using a different PC, uploaded the files to VirusTotal. They both came back with one hit, from SentinalOne (DFI - Malicious PDF).
Avast Free didn’t find anything, niether did another ™ virus scan utility or Malwarebytes. So I have no idea what might be waiting for me on the other PC. So, how screwed am I?