"Mixrootapk" appears to be a third-party source or individual that creates "modded" APKs (Android Package kits). These versions are typically altered to unlock premium features for free, such as: Removing advertisements. Unlocking "Pro" or "Premium" settings.
If your query is referring to a "paper" (like a research paper or report), there is specifically titled "AT Player v1579 Modded by Mixrootapk." Instead, this phrase is most commonly found in: AT Player v1579 Modded by Mixrootapk
This represents a specific version number of the software. "Mixrootapk" appears to be a third-party source or
Enabling restricted playback options (like playing YouTube audio with the screen off). The "Paper" Context If your query is referring to a "paper"
Documentation by security researchers (like those from Zimperium or Check Point ) who analyze modded APKs for potential malware, as these files are not verified by official app stores and can pose security risks.