I am using AutoCAD 2015. I use solid hatch to fill in my logo. However, it shows very furry lines around the logo when I export it to pdf file. When I print the file, the logo looks fine. Just when I review it in pdf on computer, it looks really bad. I need to send the drawings to clients in digital file. So anyone can help me solve this problem? Thanks a lot!!! I checked every place on Internet to solve this problem but without any luck. I will be waiting for answers. Please see below attachment to see the bad effect of the logos in pdf. 

Maybe it has something to do with your graphics card since it displays with the "fur" yet prints just fine.