Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6fd60d33179bcd…

MALICIOUS

PDF

33.8 KB Created: 2020-08-01 17:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a22ebb7895c48a5ba634cf6a1cc0d48c SHA-1: d196b8d8d3405c0445434ba105c434c272de3bf5 SHA-256: 5f6fd60d33179bcd73f0e88bffa31cfd6b3526c97dccb77c1422ffa8f1fd98f4
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service that appears to be part of an SEO link farm. The primary redirector URL is 'https://ttraff.cc/pify?keyword=engineering+mechanics+dynamics+6th+edition+pdf', suggesting a lure for users searching for academic materials. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's a redirector link and part of a link farm.

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.cc/pify?keyword=engineering+mechanics+dynamics+6th+edition+pdf In PDF document text
    • http://files.seedsolutionsseedlabs.com/uploads/1/3/1/8/131856270/1205431.pdfIn PDF document text
    • http://files.oldpaintlickcemetery.org/uploads/1/3/1/6/131637081/xuwolep.pdfIn PDF document text
    • http://files.virtuousink.net/uploads/1/3/0/7/130738725/f2c83d3e96f.pdfIn PDF document text
    • http://files.rileysportsequipment.com/uploads/1/3/2/7/132741476/gofenofesi.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/1/0433/0687/7080/files/42257023754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/2184589845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/jofot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/rigimamutovarubek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/lesojiridepulagobubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/xurasafamegogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2522/5112/files/welizobalugusasifev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/93112495491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86399573169.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 1

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_off000045fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45FD 5752 bytes
SHA-256: 54853d41c8c1a90ac6fac04e03827d17b38bed8b81d906cf714948fa2e807d0b
font_01_sfnt_off00005978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5978 9680 bytes
SHA-256: 36762578793e8017ee6a88c942ae7fb67d046bd32396ef90f804072e7cd237ff

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