Malicious PDF — malware analysis report

Static analysis result for SHA-256 3944bd29e9cf905f…

MALICIOUS

PDF

44.1 KB Created: 2020-08-19 16:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31e4f0b2ad09718bae5400e1d4af075d SHA-1: cfbc63d855a8656484a90617fea04202870ba2c9 SHA-256: 3944bd29e9cf905f7208e56a72aca77d626bb65efca45b02264dd1ebbb80fb72
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.com/pify?keyword=bimanual+examination+of+oral+cavity'. This link is likely used to redirect users to a malicious website. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. 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.com/pify?keyword=bimanual+examination+of+oral+cavity In PDF document text
    • http://files.oonaghmcdonald.com/uploads/1/3/0/7/130739202/wizenivoni.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/1/0428/7689/5398/files/18893643172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/79857569272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3426/4220/files/common_cardiovascular_diseases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/galewusowolotilira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/yookoso_an_invitation_to_contemporary_japanese_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0203/4336/files/setufixukutuxadarurex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/sadisimivizijomuwip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/carbon_nanotubes_review_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/nuwubutalus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/zesoxedaf.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_off0000710e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 5128 bytes
SHA-256: f292b0c2a6edf18365955ac476f0ce1ba5fa7f6205c611915df58372fd0c9e4a
font_01_sfnt_off00008270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8270 9824 bytes
SHA-256: 49eb78205253681c4fe4436250d2b33b5dfc8b0db87a4c6d1935b194b6bd9072

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