What is this strange site archive?

Question

CMS

Recently, a client sent me some txt files. He said that this is an archive with a site that you must first open with winrar and already click in it - view, then some hidden archive with the files of the entire site was opened. What kind of archive is this? A txt file that cannot be opened by a browser, and only packed in rar and already opened in it. And when there was a download link, the file had a name. But when I downloaded it, doodles appeared - f_09056d0744dd86ab. I even thought if they want to upload a virus to my computer.
I have never seen such a thing. Tell me who knows what kind of garbage this is? Maybe these archives are created for some kind of engine in which the layout of the site was made?

Answer 1

https://habrahabr.ru/post/254907/