Got confused by the broken link too. Those aren't separate links. It's a single link, and given the name of the file is "poster-design.pdf", I don't think the PDF is very important. It's just an image that gives examples of what is probably covered. The real content is described below as the video lectures and notes of the class[1] and the github account[2]. There are also problem sets[3], and it recommends a couple of books[4][5], both of which are apparently free.
It's too bad that the links are broken. When the links at the top of the page didn't work, I immediately assumed that this was for an old course and none of the material would still be available.
I only kept looking because I didn't think a useless site would make it to the top of HN. People who find the course site another way might not have a reason to keep looking.
I thought that the single image was a series of links to the different parts of the courses. It's at the top of the page and has 9 distinct icons representing different things that will be taught. It looks a lot like it's there for navigation. When clicking on each of them didn't work, I assumed I couldn't get to the course content.
I only kept looking because I didn't think a useless site would make it to the top of HN. People who find the course site another way might not have a reason to keep looking.