A file ending in .rar is a compressed data folder. To see what is inside "AnDay.rar," you will need to use specialized extraction software: Use the official WinRAR tool.
Alternatively, use the free and open-source program 7-Zip, which can easily unpack RAR files.
Do not open the file. Upload it directly to VirusTotal to have it analyzed by dozens of different antivirus engines simultaneously.
Use free tools from the App Store like or Keka to extract RAR contents. Possible Contexts for "AnDay"