The document purported to be the DC Madam's phone records originated in a twitter post by somebody claiming to be part of the hacking group "Anonymous". However, it's incredibly easy to Photoshop stuff like that, so, that's probably why it's not being widely reported by any reputable news organizations. Cruz did have a reputation for womanizing when he was clerking at the Supreme court, so, I wouldn't be surprised if the documents eventually turned out to be real.