In bibliometric studies of historical journals, "Adr'rar" (likely referring to the Adrar region) is listed as an entry or citation within specific volumes of La Revue Africaine . An "adr.rar" file in this context would likely be a compressed collection of scanned journal pages or metadata.
using an online tool like VirusTotal to check for malicious code. adr.rar
To provide a more helpful review, could you clarify or what it is supposed to contain (e.g., a game mod, a trading indicator, or historical documents)? La revue africaine 1856-1961: etude bibliométrique In bibliometric studies of historical journals