"ktD" is not a standard prefix for major brands like Canon (IMG_), Nikon (DSC_), or Sony (DSC_). It may belong to a specific dashcam, security camera, or a proprietary industrial imaging software.
The "0113" usually implies it is the 113th image in a folder or sequence. Check the files immediately before ( ktD_0112 ) and after ( ktD_0114 ) to establish context (e.g., a specific event or date). ktD_0113.JPG
Puzzles often hide text or other images inside a JPG. Try opening the file in a Hex Editor or using an online steganography decoder . "ktD" is not a standard prefix for major