Delete Text from existing pdf files

We wish to delete some name and address information from pdf reports. The information is in a block on the second page of every file. The text start an finish points are consistent. The start is always a date and the finish is always immediately before some text "Our Ref". I have added a yellow highlight over the section in the sample. Line feeds will need to be put in place to preserve formatting. I anticipate running this as an external application from an Access Database application but also initially over batches of a few hundred files. All files have a similar filename format ??????[login to view URL] and are stored in a set of subfolders within one folder. There are other files in these folders. I am guessing we want that type of information in a separate schema (?) file of some type.