High res PDF from Illustrator

I have created a flier in Illistrator (CS6). I want to output a high res PDF, and went through the print window so I could customize it, rather than just 'save as PDF'. Now I can't find a way of converting the ps. file into the finished PDF product. Does distiller still exist? I don't have the acrobat suite and need this output swiftly. Does anybody have any advice. Thanks...