Strange text files in Public html

[Eagle9615]

I haven't worked on my site for a few months due to college and other rl issues, but today I noticed a bunch of random text files mixed with my Public_html files. They all seem to have been added between mid-to-late November and have a random mix of letters and numbers for their names. I can be oblivious at times, but I don't remember these and I'm not sure what to do with them?

I decided to download and open one in a separate text editor (I know, not a good idea with files I don't recognize, but I got curious) and all it contained was a url (that I didn't go to).