Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb4f2a2ec60b6b8…

MALICIOUS

PDF

41.6 KB Created: 2020-08-06 12:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f3fc49ae303e6ba10ad53a50bb578c6a SHA-1: 96761934426edb521f0f8b47e762f071dd497e46 SHA-256: cfb4f2a2ec60b6b8c5d8e107ed033f5591b56e67ff44d7f505c55193290624ff
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body text and embedded URLs suggest a lure for downloading a book, which is a common tactic for distributing malware. The primary malicious URL identified is https://ttraff.cc/pify?keyword=automobile+engineering+book+pdf+for+diploma, which likely leads to a malicious payload. The ML classifier strongly flagged this PDF as malicious.

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=automobile+engineering+book+pdf+for+diploma In PDF document text
    • http://files.sawhfh.org/uploads/1/3/1/8/131871816/4a9721cfd5fe1.pdfIn PDF document text
    • http://nidegade.rutherforders7.com/uploads/1/3/0/7/130739625/bce05f20ee8.pdfIn PDF document text
    • http://files.chehandbells.org/uploads/1/3/0/8/130874429/salimemupepukevoxof.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/1/0435/0948/1624/files/pekegaxelusukapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/26910215058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/britax_boulevard_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8520/9512/files/7988472452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/56705837956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/nuxedofamogakazala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/84877572528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/bejipetojovotuxupuzexisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/86660120975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/magakodiwovufedijurut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4694/4416/files/gufuketijitonotedu.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 3

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_off00006231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 5376 bytes
SHA-256: 511b656714da191cb5c5ac6081b03b6eb17fbe186f36f4d7480af9c872ffe66a
font_01_sfnt_off00007461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7461 11200 bytes
SHA-256: 44cb07b40d5fd40e44bb9a4b5f61997c4f78de7292242450d3a22814b7def729

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