Set up on my most dusty and scratched-up table today.

There were two pics in your screenshot.
The picture in the top post is an imgur link.
The picture in the bottom post was uploaded to BF. So that would be the one which is suspect.
I can't find any direct links to imghippo in the post, either.
The only thing I can think of is that when I downloaded the pic, the file size was only 193 Kb. So that means the file was compressed sometime between the time the picture was taken and the time the picture was uploaded. I know that imghippo has file compression software available on its site. Possible that
el gigantor
used imghippo software to compress his jpg size, and that the software left signs of having been used and that Malwarebytes is finding it. If that's what is happening, then it's not a hazard to anyone.
I found this report on imghippo, but this is not a site or software that I use, so the validity of the report is not known to me:
Online sandbox report for i.imghippo.com, tagged as arch-exec, arch-scr, arch-doc, adware, adaware, verdict: Malicious activity
any.run
If using Windows, it's always a good idea to have two accounts on the machine, one with admin privileges and one without, and use the account which does not have admin privileges as your standard account. That inactivates most malware because the malware cannot install anything without asking for the admin password.