The amtlib.dll file is associated with Adobe's licensing and activation processes. Specifically, it's linked to the Adobe Activation Manager Library, which handles the activation and validation of Adobe software licenses. When a user attempts to use a cracked version of Adobe software, they often bypass the official activation process, which typically involves verifying a legitimate license through an internet connection.
GIMP (for Photoshop) or Inkscape (for Illustrator).
If your interest in "cracking" software stems from financial constraints, consider the following:
Downloading and using a "crack" for Adobe Master Collection CS6—specifically involving a modified amtlib.dll