Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aff161c0309f5b4…

MALICIOUS

PDF

42.8 KB Created: 2019-04-09 05:36:31 +03:00 Authoring application: - (via Acrobat Distiller 5.0.5 (Windows))
MD5: 1e0b455aecea4463a5c6993dbadd77ae SHA-1: aa88ebd957ddf806b1b01fd78eeaec9ac20e1f98 SHA-256: 3aff161c0309f5b42409a4cb2a100e4e1e21a8979399943b09d0d33b547daf10
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded links pointing to PDF files on the domain 'gorillawalker.com'. This indicates a likely SEO spam or link farm attack pattern designed to artificially inflate search engine rankings or distribute malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.gorillawalker.com/house-plants-25-simple-and-easy-gardening-tips-on-choosing.pdf
    • http://www.gorillawalker.com/a-modern-history-of-the-kurds.pdf
    • http://www.gorillawalker.com/low-power-crystal-and-mems-oscillators-the-experience-of-watch.pdf
    • http://www.gorillawalker.com/lonely-planet-costa-rica-travel-guide-by-lonely-planet-cavalieri.pdf
    • http://www.gorillawalker.com/green-functions-in-electrochemistry.pdf
    • http://www.gorillawalker.com/office-space-box-of-flair.pdf
    • http://www.gorillawalker.com/begin-with-a-blanket-creative-play-for-infants-baby-play.pdf
    • http://www.gorillawalker.com/der-dresdner-koch-deutsche-franzoesische-und-englische-koch-und-back.pdf
    • http://www.gorillawalker.com/piano-fitness-book-cd.pdf
    • http://www.gorillawalker.com/edition-breitkopf-wagenseil-g-konzert-fur-harfe-harp-partition-classique.pdf
    • http://www.gorillawalker.com/under-our-skin-a-white-family-s-journey-through-south.pdf
    • http://www.gorillawalker.com/seoul-survival-expat-travel-guide-survival-series-book-2-kindle.pdf
    • http://www.gorillawalker.com/alabama-football-guide-and-record-book.pdf
    • http://www.gorillawalker.com/dragonflies-and-damselflies-of-the-west-princeton-field-guides.pdf
    • http://www.gorillawalker.com/digital-signage-software-networks-advertising-and-displays-a-primer-for.pdf
    • http://www.gorillawalker.com/belgium-in-wartime-with-58-illustrations-6-maps-and-many.pdf
    • http://www.gorillawalker.com/potty-time.pdf
    • http://www.gorillawalker.com/the-first-time-about-losing-your-virginity.pdf
    • http://www.gorillawalker.com/human-physiology-an-integrated-approach-7th-edition.pdf
    • http://www.gorillawalker.com/life-application-study-bible-nasb.pdf
    • http://www.gorillawalker.com/microsoft-sharepoint-server-2010-bible.pdf
    • http://www.gorillawalker.com/a-wife-s-anal-training-the-box-set-three-stories.pdf
    • http://www.gorillawalker.com/i-speak-for-eire-utan-series-volume-2.pdf
    • http://www.gorillawalker.com/trouble-in-paradise-globalization-and-environmental-crises-in-latin-america.pdf
    • http://www.gorillawalker.com/prewrath-rapture-of-the-church.pdf
    • http://www.gorillawalker.com/eleanor-of-aquitaine-a-life-ballantine-reader-s-circle-kindle.pdf
    • http://www.gorillawalker.com/taking-action-with-teacher-research.pdf
    • http://www.gorillawalker.com/differentiated-literacy-strategies-for-student-growth-and-achievement-in-grades.pdf
    • http://www.gorillawalker.com/biopsychology.pdf
    • http://www.gorillawalker.com/anna-s-tangle-journal-volume-2.pdf
    • http://www.gorillawalker.com/introducing-literature.pdf
    • http://www.gorillawalker.com/the-asia-and-the-pacific-intra-regional-outbound-series-thailand.pdf
    • http://www.gorillawalker.com/clymer-honda-700-1100cc-v-fours-1982-1988-service-repair.pdf
    • http://www.gorillawalker.com/the-constitution-of-south-carolina-vol-3-church-and-state.pdf
    • http://www.gorillawalker.com/laboratory-manual-main-version-for-mckinley-s-anatomy-physiology.pdf
    • http://www.gorillawalker.com/broken-illusions-his-agenda-3.pdf
    • http://www.gorillawalker.com/iran-map-international-travel-maps.pdf
    • http://www.gorillawalker.com/commodity-trading-adviser-risk-and-performance-analysis-and-selection.pdf
    • http://www.gorillawalker.com/alkaline-diet-recipe-book-alkaline-diet-recipes-for-weight-loss.pdf
    • http://www.gorillawalker.com/verbos-ingleses-combinados-con-particulas-phrasal-verbs-in-use-with.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/

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