1643 AccessData Custom Content Image Aggregate The AccessData Custom Content Image (AD1) file format is a file-level disk image format created by AccessData's proprietary forensic software, such as FTK Imager. An AD1 image may span multiple files, with multipart files distinguished by their incrementing file extension, e.g. .ad1, .ad2, .ad3, etc. 195 Artefactual Systems Inc / Artefactual Systems Inc 23 Dec 2015 23 Dec 2015 fmt/842 PUID ad1 File extension ad2 File extension ad3 File extension ad4 File extension ad5 File extension 1201 AD1 BOF: ADSEGMENTEDFILE. A single AD1 file, or the first part of a multipart AD1 will also contain the string ADLOGICALIMAGE, likely at position 0x0200 1 Absolute from BOF 0 0 41445345474D454E54454446494C45