If the file inside ("LTSLL7GPD") lacks an extension or has a proprietary one, use these professional methods to determine its "feature" or purpose:
Use a standard archive manager like 7-Zip or WinRAR to open the .rar file without necessarily running the contents. LTSLL7GPD rar
Before interacting with the file, upload it to VirusTotal to check it against dozens of antivirus engines for potential threats. If the file inside ("LTSLL7GPD") lacks an extension