Sometimes found in specialized online communities (like e-book sharing) as a shorthand for a "Little Literature" bundle. Write-up: Investigating Litt.rar
If the RAR contains images, use StegSolve or steghide to check for hidden data within the pixels. Litt.rar
Use ls -la to see if there are any "dot" files (e.g., .secret.txt ). Litt.rar