using an online tool like VirusTotal to check for malicious code.

If you have encountered this file on a peer-to-peer sharing site or as an unsolicited email attachment:

The string "adr.rar" appears in several distinct contexts, none of which represent a single "product" for review: Potential Identities

Based on a search of common software repositories, academic archives, and technical databases, does not appear to be a widely recognized commercial software application or a standard public dataset. Instead, it most likely refers to a specific, user-created compressed archive.

Because it is a generic name, it is a common mask for malware or "trojanized" software.