User blog comment:Derpinator9001/D.D.T. Image question/@comment-3153244-20140518035438

We simply assumed the image was of an actual DDT. If it is not, then it will be deleted sooner or later.

The answer to your question can be found at File:D.D.T. reverse.png, where you will see that a user named Badooga1 uploaded the image here.