Malicious PDF — malware analysis report

Static analysis result for SHA-256 861f3785cd240c42…

MALICIOUS

PDF

39.2 KB Created: 2020-08-06 02:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e171431fa15fcc1776eb4570b8bf0584 SHA-1: 632cd1f6b11e74b7a3ad068d2c1b155e51301a28 SHA-256: 861f3785cd240c423110bd7b54ff0fc15b30d8d6002e3be73d2f35058b2c2930
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, 'https://ttraff.cc/pify?keyword=cancer+gastrico+temprano+pdf', which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://ttraff.cc/pify?keyword=cancer+gastrico+temprano+pdf In PDF document text
    • http://lofojo.anndesignstudio.com/uploads/1/3/2/3/132303382/kojoxemoj_penufiromaretaf_tititegolunefip.pdfIn PDF document text
    • http://files.furrygodmothermb.com/uploads/1/3/0/7/130776267/mezosajigera.pdfIn PDF document text
    • http://files.stuart.boundlessgym.com/uploads/1/3/1/4/131409574/zutegivo_girabuneviz.pdfIn PDF document text
    • http://luwixabed.hernfarms.com/uploads/1/3/0/7/130776031/5a042f9ee38cef0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/gumovugojiperi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/begokokivarevugemuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5628/2265/files/2000_isuzu_rodeo_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/55762578345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8371/8042/files/75427390063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8229/3152/files/xazilazixaxededi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/28447042837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/kutewabulosukat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/all_calculus_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/58507258082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4068/4697/files/54730477050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/premiere_pro_alternative.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/dlab_practice_test_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE2 5348 bytes
SHA-256: 833e95137b3171b80359977f0db8176111c00a60171865c6b789c316e387efba
font_01_sfnt_off00006df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 9980 bytes
SHA-256: a0b4b708708675e11bd0853260973561f112efb4d0afd507099837714c76ad5b

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