OID value: 1.2.840.113549.1.9.16.2.14
OID description:
apparently used by opensignpdf in http://opensignature.sourceforge.net/
see also http://docs.oasis-open.org/dss/oasis-dss-1.0-profiles-epm-spec-cd-01.pdf
URL for further info: http://javadoc.iaik.tugraz.at/cms_smime/3.2/iaik/smime/attributes/SignatureTimeStampToken.html
See also the OID Repository website reference for 1.2.840.113549.1.9.16.2.14