The name of the pdf that you upload needs to be identical to the last part of the link you apply to your page .. if the pdf is called guide it should work, but since it doesnt it must be named something else or you didnt put it in the proper directory .. if this is your main domain the pdf needs to be uploaded to the inside of pubic_html .. if this is an add on domain then it needs to be uploaded to the inside of the add on domain folder ..
Here is a tutorial for
embedding a pdf directly on your webpage as well .. if you are interested ...