This SonicWALL signature identifies Microsoft C/C++ Program Database (PDB) files. A program database (PDB) file holds debugging and project state information that allows incremental linking of a Debug configuration of your program. A PDB file is created when you compile a C/C++ program with /ZI or /Zi or a Visual Basic/C#/JScript .NET program with /debug.

The primary purpose of this signature is to provide True-File Type detection based on a file's contents rather than relying on the provided file extension or MIME type.