Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3d262c233e3578…

MALICIOUS

PDF

31.7 KB Created: 2020-01-10 17:21:36 +03:00 Authoring application: QuarkXPress(tm) 6.1
MD5: 683349a5546bbe1fbb98a2fdd2b84a9b SHA-1: cae5f191332f007b74e4b66e897f6c6d56fd820d SHA-256: fd3d262c233e35783d72283e3ff6b528abbaf8f057537c80e9d1017b163d3baa
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 and a critical heuristic identified it as a link farm. It contains 32 external links, primarily pointing to PDFs on the gorillawalker.com domain. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8447

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/standard-catalog-of-sports-memorabilia-3rd-edition.pdf
    • http://www.gorillawalker.com/vascular-surgery-european-manual-of-medicine.pdf
    • http://www.gorillawalker.com/continuing-appeal-of-nationalism.pdf
    • http://www.gorillawalker.com/exploring-the-world-of-music-reader-review-guide-text.pdf
    • http://www.gorillawalker.com/second-passports-special-report-1-secrets-big-brother-doesn-t.pdf
    • http://www.gorillawalker.com/adding-it-up-adding-calcium-to-food-and-beverages-foods.pdf
    • http://www.gorillawalker.com/the-marble-man-robert-e-lee-and-his-image-in.pdf
    • http://www.gorillawalker.com/california-missions-account-of-a-tour-of-california-missions.pdf
    • http://www.gorillawalker.com/kids-travel-journal-my-trip-to-bermuda.pdf
    • http://www.gorillawalker.com/our-crowd-the-great-jewish-families-of-new-york.pdf
    • http://www.gorillawalker.com/cinemagoing-latin-america.pdf
    • http://www.gorillawalker.com/computer-networks-3rd-edition.pdf
    • http://www.gorillawalker.com/los-generos-cinematograficos-film-genre-comunicacion-cine-communication-film-spanish.pdf
    • http://www.gorillawalker.com/tyrannosaurus-lex-the-marvelous-book-of-palindromes-anagrams-and-other.pdf
    • http://www.gorillawalker.com/the-bickerstaff-partridge-papers-the-great-hoax.pdf
    • http://www.gorillawalker.com/dios-y-la-existencia-del-mal-spanish-edition.pdf
    • http://www.gorillawalker.com/stand-still-like-the-hummingbird-new-directions-paperbook.pdf
    • http://www.gorillawalker.com/field-marshal-sir-william-robertson-chief-of-the-imperial-general.pdf
    • http://www.gorillawalker.com/hydroelectric-relicensing-and-nuclear-energy.pdf
    • http://www.gorillawalker.com/improvement-of-the-mind.pdf
    • http://www.gorillawalker.com/critical-procedure.pdf
    • http://www.gorillawalker.com/come-unto-me.pdf
    • http://www.gorillawalker.com/pocket-atlas-of-sectional-anatomy-computed-tomography-and-magnetic-resonance.pdf
    • http://www.gorillawalker.com/shape-knowabout.pdf
    • http://www.gorillawalker.com/the-seal-oil-lamp-adapted-from-an-eskimo-folktale-and.pdf
    • http://www.gorillawalker.com/paul-for-everyone-romans-part-2-new-testament-for-everyone.pdf
    • http://www.gorillawalker.com/abcs-of-god.pdf
    • http://www.gorillawalker.com/development-of-university-libraries-in-india-after-independence-concepts-in.pdf
    • http://www.gorillawalker.com/one-crow-alone-after-the-snow.pdf
    • http://www.gorillawalker.com/the-quimby-manuscripts.pdf
    • http://www.gorillawalker.com/brie-surrenders-to-his-will-brie-8.pdf
    • http://www.gorillawalker.com/bet-your-life-jess-tennant-mysteries.pdf
    • http://www.gorillawalker.com/lady-thief.pdf
    • http://www.gorillawalker.com/the-iron-jawed-boy-and-the-hand-of-the-moon.pdf
    • http://www.gorillawalker.com/echo-booming-the-play-an-episodic-play-in-one-act.pdf
    • http://www.gorillawalker.com/success-in-mlm-network-marketing-and-personal-selling-a-step.pdf
    • http://www.gorillawalker.com/whole-foods-for-the-whole-family-la-leche-league-international.pdf
    • http://www.gorillawalker.com/animal-records.pdf
    • http://www.gorillawalker.com/zum-verhaltnis-von-staat-und-kirche-in-der-spatantike-studien.pdf
    • http://www.gorillawalker.com/the-lightworkers-healing-method-be-who-your-soul-wants-you.pdf
    • http://www.gorillawalker.com/co
    • 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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