I just followed the advice of this forum post in order to export the vector layers of a PDF for usage in ArcMap. The map vector layers in the PDF were spatially referenced. I was able to export the layers as a DXF using Inkscape and open the layers in ArcMap. I then went to the properties of the DXF in catalog and set the proper projection. However, when I brought the DXF into the map document, it was not showing up in the right location. It appears the the spatial information was somehow removed in the process of exporting into a DXF. Does anyone know of a solution to my situation? Thanks!
I'm not familiar with your InkScape step but there is Online Help here on how to go about Georeferencing CAD datasets such as DXF for display in ArcMap.