\addtolength{\oddsidemargin}{-.875in} \addtolength{\evensidemargin}{-.875in} \addtolength{\textwidth}{1.75in} \addtolength{\topmargin}{-.875in} \addtolength{\textheight}{1.75in}
\enlargethispage{-X.Yin}
somewhere at the top of the first column of the last page. The last page gets effectively shortened by the “X.Yin” amount.
pdf2ps doc.pdf
ps2pdf13 -dPDFSETTINGS=/prepress doc.ps doc2.pdf
via http://thomer.com/howtos/embed_font_in_pdf.html