Use a standard archive manager like 7-Zip or WinRAR to open the .rar file without necessarily running the contents.

Most files have a unique hexadecimal "signature" at the very beginning that identifies their true type, regardless of the filename.

Use a hex editor like HxD to view the first few bytes.

Because "LTSLL7GPD" is not a common file name, exercise caution:

Use TrID , which compares the file's binary patterns against a database of over 15,000 definitions to give you a percentage-based match of what the file likely is. 3. Safety and Verification

Once open, look at the extension of the file(s) inside. If no extension is visible, you can enable them in Windows File Explorer by selecting View > Show > File name extensions . 2. Technical Analysis for Unknown Files