Required fonts:
- Allegre Sans
- Futura LtCn BT
- sans-serif
Converting RGB pdf to CMYK pdf:
$ gs \
-o poster-cmyk.pdf \
-sDEVICE=pdfwrite \
-sProcessColorModel=DeviceCMYK \
-sColorConversionStrategy=CMYK \
-sColorConversionStrategyForImages=CMYK \
poster-rgb.pdf