If they're available via a link, as they would be, then yes. 🙂
There are numerous apps for storing them on your phone and viewing them as well, by the way, but the iPhone natively supports reading web-accessible and emailed PDF files. 🙂
I have found that PDF's larger than 50MB can give me problems. One's as large as 100MB have crashed my phone. The smaller ones work brilliantly though.