Just searched my email and found the 659 page pdf! Turns out it was actually the Deathly Hallows, it’s funny how things from 2007 are so hazy.

Edit: if you’re interested: https://send.vis.ee/download/27db692ca15bba86/#ar2iQDj3vvrB1yfjvXm1DQ

Was it the “leaked” version of the Half Blood Prince? If so, a girl I was interested in sent that to me saying that her aunts friend worked for the publisher and I couldn’t show anyone or else they’d all go to jail. I was in high school so of course my mom was suspicious when I was spending hours reading something on the computer, so she made me tell her what it was, and I remember crying and begging her not to tell anyone that this girl I wanted to bang had sent it to me haha