PDF uploaded by bombinomicon: http://bombinomicon.tumblr.com/post/46825838407/i-cant-even-remember-where-i-got-this-pdf-but-i Apparently the original scanner is unknown to him/her.
In case you never heard anything about this book, it's a compilation of interviews, fan-letters, stills from the series/films and illustrations about Kaworu Nagisa published by Kadokawa years ago.