Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d22440865bdd565…

MALICIOUS

PDF

43.1 KB Created: 2019-04-10 12:10:10 +03:00 Authoring application: QuarkXPress(R) 9.54
MD5: 697731948ed0043df5a884c58444b090 SHA-1: 39c4a3bc220b41c7fe33d1270aca2c136d25d89a SHA-256: 5d22440865bdd56579bc4430ffb364f120a169ad9d8916be38ac257b75b20785
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links to external PDF files, primarily hosted on 'gorillawalker.com'. This heuristic firing suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the ML classifier flagged the PDF as malicious, and the embedded URLs are the primary indicators of compromise. The attack pattern likely involves directing users to a large collection of documents, potentially for malicious redirection or to inflate search engine rankings.

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/living-with-a-weakness-an-honest-perspective-of-a-christian.pdf
    • http://www.gorillawalker.com/power-system-analysis-and-design-pws-series-in-engineering.pdf
    • http://www.gorillawalker.com/flexographic-image-reproduction-specifications-and-tolerances-5-0.pdf
    • http://www.gorillawalker.com/the-rose-of-sodom.pdf
    • http://www.gorillawalker.com/best-in-popular-sheet-music-alto-saxophone.pdf
    • http://www.gorillawalker.com/the-anchor-bible-dictionary-vol-3-h-j.pdf
    • http://www.gorillawalker.com/making-toys-for-preschool-children-using-ordinary-stuff-for-extraordinary.pdf
    • http://www.gorillawalker.com/beast-quest-89-solix-the-deadly-swarm.pdf
    • http://www.gorillawalker.com/chris-drury-mushrooms-clouds-center-for-american-places-center-books.pdf
    • http://www.gorillawalker.com/chivos-chivones-spanish-edition.pdf
    • http://www.gorillawalker.com/farm-and-smallholder-fencing-a-practical-guide-to-permanent-and.pdf
    • http://www.gorillawalker.com/lighthouse-girl.pdf
    • http://www.gorillawalker.com/bandit-s-moon-night-and-day-book-3-kindle-edition.pdf
    • http://www.gorillawalker.com/tuscany-toscana-travel-reference-map-international-travel-maps.pdf
    • http://www.gorillawalker.com/her-shameful-desires-background-scenes-book-1.pdf
    • http://www.gorillawalker.com/the-operative-charnwood-large-print.pdf
    • http://www.gorillawalker.com/what-makes-tehran-tick-islamist-ideology-and-hegemonic-interests.pdf
    • http://www.gorillawalker.com/a-walking-tour-of-vienna-maryland-look-up-america-kindle.pdf
    • http://www.gorillawalker.com/chironomidae-larvae-volume-1-general-ecology-and-tanypodinae.pdf
    • http://www.gorillawalker.com/let-s-go-fossil-shark-tooth-hunting-a-guide-for.pdf
    • http://www.gorillawalker.com/the-gernsheim-collection-harry-ransom-center-photography.pdf
    • http://www.gorillawalker.com/muzzleloading-complete-hunter.pdf
    • http://www.gorillawalker.com/saving-democracy-from-suicide-how-government-by-the-people-leads.pdf
    • http://www.gorillawalker.com/sovereign-wealth-funds-legitimacy-governance-and-global-power.pdf
    • http://www.gorillawalker.com/literacy-and-mothering-how-women-s-schooling-changes-the-lives.pdf
    • http://www.gorillawalker.com/fundamentals-of-analog-and-digital-communication.pdf
    • http://www.gorillawalker.com/en-el-bano-toilet-tales-spanish-edition.pdf
    • http://www.gorillawalker.com/code-of-federal-regulations-title-26-internal-revenue-pt-1.pdf
    • http://www.gorillawalker.com/prison-and-jail-administration-practice-and-theory.pdf
    • http://www.gorillawalker.com/for-zion-a-mormon-theology-of-hope.pdf
    • http://www.gorillawalker.com/all-he-wants-all-or-nothing.pdf
    • http://www.gorillawalker.com/atlas-of-imaging-in-sports-medicine-2nd-edition.pdf
    • http://www.gorillawalker.com/future-indefinite-the-great-game.pdf
    • http://www.gorillawalker.com/chemistry-in-focus-a-molecular-view-of-our-world-textbooks.pdf
    • http://www.gorillawalker.com/my-son-s-battle-with-epilepsy-a-mother-s-anguish.pdf
    • http://www.gorillawalker.com/make-money-stripping-how-to-make-money-as-an-exotic.pdf
    • http://www.gorillawalker.com/makeup-makeovers-in-5-10-15-and-20-minutes-expert.pdf
    • http://www.gorillawalker.com/bardaisan-of-edessa.pdf
    • http://www.gorillawalker.com/not-without-courage-shadowcreek-chronicles.pdf
    • http://www.gorillawalker.com/journey-continued-an-autobiography.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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