With the Adobe Acrobat PDF Optimizer, you can reduce the file size of a PDF in a number of ways. For example, you can compress images, flatten PDF layers, remove document data and unembed fonts. When a font is embedded in a PDF, the exact font formatting is always used in the PDF. When you remove an embedded font, a substitute font is used for the PDF if the font is not installed on a computer on which the PDF is viewed. You can remove embedded font for Roman text and East Asian text.
Open the PDF in Adobe Acrobat, click "Advanced" and choose "PDF Optimizer."
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Click the "Fonts" check box in the left pane.
Select the font you want to remove from the "Embedded fonts" pane. You can select multiple fonts by pressing down the "Ctrl" key as you select multiple fonts.
Click "Unembed" and click "OK."
Provide a name for the file, select where you want to save the file and click "Save."