Considering they are only 16KB, I would say they are highly suspect and may well just the hook to get you infected.
Zero hits on either file on VT, but a more detailed analysis shows it displays a fake trojan alert and no doubt has some sort of click to download/run a scan, etc. and that is when you would get infected.
That is always going to happen they are moving them round file sharing sites and there is nothing that you can do about that. You can’t block all file sharing sites just because some pond life uses them to distribute malware.
The fact that the suspect files are there isn’t a huge risk as you aren’t physically executing the file; possibly more so is your flagging these locations in a publicly available web site, with no control over who might visit and what they might do with the sample.
So you found them again, report it directly to avast, not that they can do much about the site location, so send the samples directly to avast.