For this you need to Merge the Multiple PDF files Into One.. Go for Adobe PDF merger tool
Combine and merge files into one PDF:
1. In Acrobat, click on Tools menu, select Combine Files.
2. Click Combine Files, click Add Files to select the files you want to include in your PDF.
3. Click, drag, and drop to reorder the files and pages. You can double-click on a file to expand and rearrange individual pages.
Press the Delete key to remove unwanted content.
4. When done, click Combine Files.
5. Click the Save button.