Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a12792dc8f200ae…

MALICIOUS

PDF

145.8 KB Created: 2020-07-30 20:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 847d24b3b94a1bc665ac273d7af9c2d7 SHA-1: e17654f2fceb518448dfb821fc591ede574189ea SHA-256: 3a12792dc8f200ae980f2fc68a26c1f7924d2d48e468c6043a4653a41a804e72
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=medical+terminology+for+dummies+pdf+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'medical terminology for dummies pdf free', suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=medical+terminology+for+dummies+pdf+free In PDF document text
    • http://files.joewilford.com/uploads/1/3/0/7/130775922/5981759.pdfIn PDF document text
    • http://files.tenupministries.org/uploads/1/3/0/7/130776366/6827090.pdfIn PDF document text
    • http://files.caryapexyouthchoir.org/uploads/1/3/1/4/131408172/1327135.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/1/0428/9835/8432/files/89120948070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/95285804797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/45553356644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0752/files/85760711733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/sedobewag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/feliturezesujezafavowuzad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/87083693605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8223/6583/files/xuvubutiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/xukimuriwiguwuretimova.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB58 5464 bytes
SHA-256: ae534f0fb67e7bf73cc9ce4a4ab53376902b8662b7ecb7fa5a083151bfe5ed64
font_01_sfnt_off0001fde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDE1 12076 bytes
SHA-256: da03775642c2f75b5fb5e831222d505a7011824542f035271bb39c0808159656
font_02_sfnt_off00022496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22496 16060 bytes
SHA-256: d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc

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