For the PDF, just leave Shipping/Buyer's Address disabled in the settings of that product.
Go to Seller Admin>View/Edit/Delete Products:
Select an existing shippable product of yours and click Edit;
On the first screen, if Shipping/Buyer's Address is not checked there, tick that box;
Click Next until you can Submit to save settings (Shipping Options will not matter);
Repeat this for all your tangible goods;
When adding new shippable products, remember to enable Shipping/Buyer's Address.
Go to Seller Admin > Cart Shipping Settings and set up the following:
Shipping Origin: select United States and enter your zipcode;
Shipping Destinations: if you will only ship to certain countries, select them in the list, or otherwise select nothing for Worldwide shipping;
Leave all other settings blank or 0.00;
Click Next to save settings and proceed to the Shipping Rules screen.
In the Existing Shipping Rules menu, select and Delete any Rules you may have saved there.
Set up your first Shipping Rule for Domestic shipping:
Shipping Rate Calculator:
- Flat (if this will be a flat rate per entire order, regardless of order size), or
- Price per unit (if this will be a flat rate per item).
Shipping Amount: 5.00;
Country: United States;
Click Submit to save the Rule.
If you will ship Internationally at a different rate:
Shipping Rate Calculator:
- Flat (if this will be a flat rate per entire order, regardless of order size), or
- Price per unit (if this will be a flat rate per item).
Shipping Amount: 14.00;
Country: All Countries (i.e. the rest of your Shipping Destination countries);
Click Submit to save the Rule.
Click Back to Admin, and you're done!