Before extracting, upload the file to VirusTotal . It will check the file against over 70 different antivirus engines.
If you can share or what software you were using at the time, I can help you dig deeper into its specific purpose. 38967549.rar
Random-digit filenames are usually generated by automated systems rather than humans. You often find them in: Before extracting, upload the file to VirusTotal
Old FTP sites or "abandonware" collections frequently used numbered indexing. 38967549.rar