No.
Draw will open PDF files but display them as a set of graphical pages. You may notice formatting errors due mainly to font metrics and not managed PDF markup.
Don’t expect to see a standard text document. As mentioned above, PDF is interpreted as a collection of graphical objects. You no longer have paragraphs but a group of text boxes. Even lines may be split into several text boxes.
Adding, deleting and modifying text will be a nightmare.
You should try a PDF viewer. There are many of them in the free and open source domain. Most of them allow annotations (but rarely modifications).
Either request from the senders a modifiable format, e.g. .odt (even Word can produce that, though in its own voluntarily non-standard way), or use an OCR utility to turn PDF text into a plain text file.
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