Malicious PDF — malware analysis report

Static analysis result for SHA-256 121ad479d39bd5ab…

MALICIOUS

PDF

42.2 KB Created: 2020-08-12 12:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 727e4ee232bbcfe28a5b6703e79bcd86 SHA-1: 804889599a108a75429ba47778809c2733520291 SHA-256: 121ad479d39bd5ab5cc7f08eec2f31cdbb3027792b60f7990d9754ff64b920dd
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body and embedded links suggest a lure to download further content, likely malicious. The ML classifier strongly indicates maliciousness, and the presence of a redirector link supports a phishing or content-luring attack pattern.

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.ru/pify?keyword=examen+de+l+appareil+digestif+pdf In PDF document text
    • http://files.wellesleyfamilydental.com/uploads/1/3/1/8/131871816/4615243.pdfIn PDF document text
    • http://files.nationalriskmanagementgroup.com/uploads/1/3/2/6/132682731/9cc68260.pdfIn PDF document text
    • http://files.authorizedealers.com/uploads/1/3/1/3/131383480/lujolitusade.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/1/0434/1966/4540/files/15627933930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/kakavavebokizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/4752/0165/files/benim_hocam_yks_matematik_ders_notlar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0886/6974/files/psycho_cybernetics_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/simple_adding_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3080/5653/files/tukelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/bruchgleichung_aufgaben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85583151980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7298/6015/files/xupitujotetomuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0710/6462/files/sisudewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/lokunulesanasasigejoxe.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 7

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_off000061c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 5388 bytes
SHA-256: 04ec999d4b7cc030f14e04582112ac477a5121dac09512895827dac8348e1c1e
font_01_sfnt_off00007407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 12036 bytes
SHA-256: a6f974aa0324aff07e4c1d55151530746bdc7e9d5e6221928b7d5ec9f75c52b4

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