Malicious PDF — malware analysis report

Static analysis result for SHA-256 761e414996db5bbe…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 16:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef2a18e5348a12a8dc89b69a2e2dc71c SHA-1: e2e9428a1663615cf4b3d42c2bc7ca750a38c9ab SHA-256: 761e414996db5bbec17b12d4fd8b4373278b7403a1b94ede63cf16ed398cc779
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a redirector at 'ttraff.ru'. This indicates a link farm or SEO manipulation tactic, likely to drive traffic or phish users. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself contains embedded URLs that are part of the malicious infrastructure.

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/wb?keyword=instruction%20set%20in%208085%20microprocessor%20pdf In PDF document text
    • http://files.fccvideo.org/uploads/1/3/1/6/131606552/pajanexixuwe-rasenitilujutox.pdfIn PDF document text
    • http://files.thestudiosouthtampa.com/uploads/1/3/1/3/131380618/dorubelaxufit-zaseb-zozuto.pdfIn PDF document text
    • http://files.aatgwa.com/uploads/1/3/1/4/131483083/mejat.pdfIn PDF document text
    • http://welakob.karenskreativekorner.com/uploads/1/3/2/3/132302782/724881.pdfIn PDF document text
    • http://files.lockmangenetics.com/uploads/1/3/0/7/130775383/nizejab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/47613255453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/84860532831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9647/3749/files/arraybuffer_to_blob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9406/3770/files/11915526085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1987/8048/files/74938067326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/mufutexovetabisepus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/nosesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3040/0411/files/fedora_install_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8230/7989/files/dukokilakopapeme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/28896000674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6578/6006/files/9179134721.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6015 5336 bytes
SHA-256: 5dcce77ac63327a18232edde6a51714fc61e6d3811077465f9043c2f1fac9954
font_01_sfnt_off0000721f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721F 10456 bytes
SHA-256: 764a21c54f1885eec7bfa0d9aef392f36f4328d24eb79cc9536d6fffe8de2a74
font_02_sfnt_off000095d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378