there is a requirement from Planet Pdf Forum
I have 600 PDFs that need to be scaled 87.5% horizontally and 93% vertically. What Acrobat 8 plug-in or software do I need?
and here is the demo version of the solution, bases on iText, developed in java, so can be run at windows, Linux, FreeBSD and mac OX. it just needs jvm1.4
pdfresize(519K)