[devidw]

I come across these links as well and was able to find some of the source code, which generates these spam pages.

Actually, you can go ahead to such a spam page and view the index.html page of the current folder and what you will get is an HTML file with PHP code, which is not interpreted by the PHP interpreter, because the file has a dot HTML extension.

In the script, you can see from where the script fetches the displayed data and from which IPs the data is requested and received.

I copied such an index.html file into a gist: https://gist.github.com/devidw/ce2bdb78bb2e30a8e8437acc2c587...

I also wrote a blog post about the details of what is happening in the PHP script: https://david.wolf.gdn/google-untitled-links-i-found-the-sou...