Not entirely unlikely this is just a bug on Google's end.
It's fairly common for there to be a very long and circuitous route between cause and effect in search, so a bug like this can sometimes be difficult to identify until people start making blog posts about it.
It seems that this is not happening and even the guy who wrote the article mentions it:
> I don't have a robots.txt right now. It hasn't been there in a long time. Google still shows two results when I search for files on my site though:
The source that he links to is another indian spam channel we've seen a thousand times on YouTube