Malicious PDF — malware analysis report

Static analysis result for SHA-256 754bf34d8c902599…

MALICIOUS

PDF

43.7 KB Created: 2020-08-11 06:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 480092f16df7e383740a1879f03c6963 SHA-1: cc8aefdd38ab60a657f79dc3424698ccf74fc529 SHA-256: 754bf34d8c90259911713ff9a4594f82884ff837ed73c9d40b862786469740ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that appears to be part of a link farm designed to attract users searching for specific documents. The document body, though heavily obfuscated, contains the same lure text as the redirector URL, suggesting an attempt to trick users into downloading potentially malicious content. The ML classifier and critical heuristics strongly indicate malicious intent.

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=anatomy+and+physiology+questions+and+answers+pdf+free+download In PDF document text
    • http://files.austriansinhawaii.com/uploads/1/3/1/4/131406717/554a3aeb.pdfIn PDF document text
    • http://files.qldphilconsulate.com/uploads/1/3/1/6/131607712/0e1d1.pdfIn PDF document text
    • http://files.alexfullermedia.com/uploads/1/3/0/8/130813765/xidepo.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/1/0434/3716/2657/files/99957101047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/digajiriranazogomuxezomis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1872/9110/files/sir_arthur_conan_doyle_short_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/equation_of_a_circle_given_3_points.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/bomoberokotorotezek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/ring_of_elysium_duo_locked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/penguin_dictionary_of_political_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/47228090597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/1015323909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/winowepipakonelafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zutowujovepenatugipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/37892090896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3657/1805/files/87583775842.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 4

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_off000067aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AA 5764 bytes
SHA-256: df8cf078c2a8a15c66fa0473fcdc016ee34ca61252f8a9358780d2ee256ae766
font_01_sfnt_off00007b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B29 10560 bytes
SHA-256: 588aefd2bec7227a02077388df9ab23eb28943a73f0720f88516d178d1a2f4b9

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