Hi,
Reader can only be used to view pdf's so you cannot perform any operations on it.
If you have Acrobat then you can go to Acrobat > save as other > Reduced file pdf
You can also go to Acrobat> Save as other> Optimized pdf and then click on 'Audit Space Usage' button to know what is occupying how much space in the pdf and adjust accordingly.
Image may be NSFW.
Clik here to view.
Regards,
Rave
