I uploaded it to documents.google.com. If you don't have an account, it's free to sign up. Once you have an account, there is a red "upload" button on the upper-left side of the screen. Click it, locate the file you want to upload, and click ok. Once the progress bar on the right side of the screen is done, click on the share button. Change the settings so that anyone with the link can view the file, click ok, right click the URL, select copy, click ok, then make a post and paste the URL.