Hi Kevin,
As you've found, you can't move CAD data in a block once it's loaded. You really need to load it into it's correct position.
Do you have a point on the PDF's that you can identify on the CAD file? This is really necessary to align the two together, and if the rotation of the CAD and PDF is different you need 2 points.
If you have a match point, and you have a CAD editor, the easiest solution is to use the move tool in CAD. You type 'move' into the console, select all you points, click on the match point, and then type the new co-ordinate. For the new value you would find the match point in Kubla Cubed and write down the co-ordinates shown on the cursor at that point. Then save that modified file and load the data into Kubla Cubed.
If you don't have a CAD editor, let me know and I'll give it some more thought.
Leo