Before extracting, run the file through a reputable scanner like VirusTotal , which checks the file against dozens of antivirus engines simultaneously.
Do you have more context on where this file or what it's supposed to contain ?
To view the contents of the file, you will need extraction software. Popular options include:
A highly-rated free and open-source alternative that supports almost all archive formats. The Unarchiver: A popular, simple tool for macOS users . Safety Precautions
The original tool for creating and opening RAR files .
