This often refers to a simulation or management-style game found on adult gaming sites. "Helpful papers" in this community usually take the form of walkthroughs, guides, or "read-me" files included inside the .rar archive or posted on the game's official community page.
If you are looking for information about this specific file, here are the most likely contexts: File: Elf_Breeding_Farm.rar ...
Before opening it, run it through an antivirus program or VirusTotal . This often refers to a simulation or management-style