@Test
    public void testPopupAnnotation() throws Exception {
        XMLResult r = getXML("testPopupAnnotation.pdf");
        assertContains("this is the note", r.xml);
        assertContains("igalsh", r.xml);
    }
PDFs can be "protected" with the default password. This means
they're encrypted (potentially both text and metadata),
but we can decrypt them easily.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/test/java/org/apache/tika/parser/pdf/PDFParserTest.java