I agree with the PDF's version of the initial part of the phrase but it does not appear to include the last part of the riff. I do not have my bass on my right now. I will take a whack at it from memory, but this is a whack whack...
After the initial phrase (as outlined in many previous posts) is repeated 3x's the phrase has a final turn that is something like this:
G------------------------------
D---------x0h2h0----------0---
A----------------2---2h0h2----
E--0--xx-2---------------------
Disclaimer: I am at work, air-bassing what I think I play... I am not sure of this, but the end of the phrase is something like what I tabbed. Forgive me for being so vague.
AND... I think - I am not sure about this, but I believe the keyboard is doubling the part which adds to the very unusual tone - at least it sounds that way on the album - like a clavicord setting played in the same register as the bass part.
This is definitely one of the most unique riffs in rock 'n' roll history and is very difficult to pull off perfectly achieving both rhythmic and tonal accuracy. There are a lot of components in play; bass, pick, amps, (effects chain), and I believe a keyboard part as well.
And finally - as my favorite band director used to say, "If you can't say it, you can't play it."
So try really hard to learn how to say (sing) the part over and over again. Once you get your head around it and can actaully 'say it', playing it becomes much more accessible.