diff --git a/pdfminer/pdfdocument.py b/pdfminer/pdfdocument.py
index 3b2b551..90da1a8 100644
--- a/pdfminer/pdfdocument.py
+++ b/pdfminer/pdfdocument.py
@@ -644,10 +644,24 @@ class PDFDocument(object):
     def _getobj_parse(self, pos, objid):
         self._parser.seek(pos)
         (_, objid1) = self._parser.nexttoken()  # objid
-        if objid1 != objid:
-            raise PDFSyntaxError('objid mismatch: %r=%r' % (objid1, objid))
         (_, genno) = self._parser.nexttoken()  # genno
         (_, kwd) = self._parser.nexttoken()
+        # #### hack around malformed pdf files
+        # copied from https://github.com/jaepil/pdfminer3k/blob/master/pdfminer/pdfparser.py#L399
+        #to solve https://github.com/pdfminer/pdfminer.six/issues/56
+        #assert objid1 == objid, (objid, objid1)
+        if objid1 != objid:
+            x = []
+            while kwd is not self.KEYWORD_OBJ:
+                (_,kwd) = self._parser.nexttoken()
+                x.append(kwd)
+            if x:
+                objid1 = x[-2]
+                genno = x[-1]
+        # #### end hack around malformed pdf files
+        if objid1 != objid:
+            raise PDFSyntaxError('objid mismatch: %r=%r' % (objid1, objid))
+
         if kwd != KWD(b'obj'):
             raise PDFSyntaxError('Invalid object spec: offset=%r' % pos)
         (_, obj) = self._parser.nextobject()
diff --git a/samples/contrib/2b.pdf b/samples/contrib/2b.pdf
new file mode 100644
index 0000000..6a80676
Binary files /dev/null and b/samples/contrib/2b.pdf differ
diff --git a/tests/test_tools_pdf2txt.py b/tests/test_tools_pdf2txt.py
index 82da814..9292b78 100644
--- a/tests/test_tools_pdf2txt.py
+++ b/tests/test_tools_pdf2txt.py
@@ -47,5 +47,8 @@ class TestDumpPDF():
     def test_7(self):
         run('../samples/contrib/','stamp-no')
     """
+ 
+    def test_8(self):
+        run('../samples/contrib/','2b','-A -t xml')
 if __name__ == '__main__':
     nose.runmodule()