i have problems whit PDF

[itamex2003]

I have a document in pdf of 32 pages, I do not know if it is printed from xpress. I have rippato the document in order to insert it in my system (BARCO) and have found of the anomalies in the shadows of some written. I explain myself: On the PDFci they are of the written white line with blue contour with a shadow and of the written ones of a color formed from yellow and magenta always on a retinata shadow of black; in my rippato document the written ones have become transparent. However I have loaded the pages in issue like attached, the written ones are those on the part low of the pages with deep white.