Attackers often use common office titles (Secretary, Invoice, Payroll) to trick users into clicking. The underscore _ is frequently used to bypass basic filename filters or to make the file look like a "temp" or "hidden" system file.
If you are a developer looking to "generate a feature" for an app that handles these types of files (like an automated filing or extraction system): _ Secretaryrar
You might be looking for a script that "looks into" (scans) specific RAR files to extract metadata or "Secretary-style" documents (PDFs, Docx) automatically. _ Secretaryrar