The name appears to be a random or unique identifier. Since .rar files are compressed archives that can contain any type of data—including software, documents, or potentially harmful scripts—you should be cautious.
If you didn't expect to receive this file or don't know the source, it is safest not to open it. If you do need to check its contents, I recommend scanning it with an updated antivirus program or using an online tool like VirusTotal first. 8894tyyy.rar