Upload the extracted file to services like CheckFileType.com or Toolsley's File Identifier to identify it based on content analysis.
Since the file has a .rar extension, you must first extract or peek inside it to see the actual "LTSLL7GPD" file. LTSLL7GPD rar
Use a standard archive manager like 7-Zip or WinRAR to open the .rar file without necessarily running the contents. Upload the extracted file to services like CheckFileType
Because "LTSLL7GPD" is not a common file name, exercise caution: LTSLL7GPD rar