Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1b23c8fa76c7cd…

MALICIOUS

PDF

33.6 KB Created: 2020-08-15 05:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dfdda0a01536112c97a5cd6cf4cba515 SHA-1: f637353cab9378bb39c6337e98a6431f8c51b6e2 SHA-256: de1b23c8fa76c7cdca7dbfebefa6e0e1bb1fff775ff14abd14c3b228cd5024b1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=244+guidelines+engineering+lettering'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links pointing to various PDF files, some hosted on Shopify. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful content.

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=244+guidelines+engineering+lettering In PDF document text
    • http://wumifez.janebissellwriting.com/uploads/1/3/1/3/131382133/logonu_vufozurewo_pajanuvemo_dopurukuvovu.pdfIn PDF document text
    • http://files.drivingfordeclan.com/uploads/1/3/1/6/131606733/a5645474.pdfIn PDF document text
    • http://wukevo.avanvive.com/uploads/1/3/1/4/131482952/93f1626.pdfIn PDF document text
    • http://xegon.worldclasslanguagesolutions.com/uploads/1/3/2/6/132696111/3618061.pdfIn PDF document text
    • http://files.ieatoutloud.com/uploads/1/3/0/8/130815080/kunezenu.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/1/0439/1708/2792/files/6473464738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/55188079605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/48191920976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/24400256756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/33348227904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/vofidikenep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/arduino_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8060/5077/files/les_amplificateur_de_puissance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1853/4557/files/analysis_of_financial_statements_dk_goel.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 8

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_off00004640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4640 4908 bytes
SHA-256: 9d8a6399c011659d802f5124489b90c34160134f4bf302269af63ffe6232abfa
font_01_sfnt_off000056fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56FD 10096 bytes
SHA-256: 75dde961a17e2947a4b70131519057edacc86f6f1501e289b431ad6fc83dec70

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