If you are using Linux, you should be able to use the "pdfimages" program to extract the images, and then use "exiftool" to extract time and date information.
When I do so, I get 146 images; the first has an EXIF timestamp of "2009:04:27 09:24:56", and the last has "2009:04:27 10:14:11".
Great. So the time stamp info is there. Unfortunately, I am not using Linux.