You can use a dynamic textfield with no border or background for the transparent textfield. You can use a component scrollbar to scroll if the text amount is larger than the textfield size. Set the target in the scrollbar component to the textfield instance name. For continuous scrolling, try...
As to loading a .pdf file into Flash, it can't be done. A .pdf file will only open in the default application for .pdf files(acrobat reader) which is a seperate application from flash. Flash can only load text files.
A mind once stretched by a new idea never regains its original dimensions.
- Oliver Wendell Holmes