Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9c0ef14b3f0c55f…

MALICIOUS

PDF

44.6 KB Created: 2020-08-02 11:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30ce03e3ef59adeb1ffc937198e23c0a SHA-1: cb2b18c59879caa3be2699104b552fda07bb3ecb SHA-256: a9c0ef14b3f0c55f0db0a5376754dafdea2766391423c416578de8a28805a1f1
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.cc/pify?keyword=james+s+walker+physics+4th+edition+pdf'. This indicates the document is designed to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely as a tactic to improve search engine ranking for malicious content or to distribute further payloads. The ML classifier strongly supports the malicious nature of this PDF.

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=james+s+walker+physics+4th+edition+pdf In PDF document text
    • http://files.lorokawirehairedvizslas.com/uploads/1/3/0/8/130815017/1165479.pdfIn PDF document text
    • http://files.columbiadentcenter.com/uploads/1/3/1/3/131398504/6237341.pdfIn PDF document text
    • http://files.raewyncaisley.com/uploads/1/3/2/6/132681512/sapufup-kuwuluk-xinasawiwuboja-tepolige.pdfIn PDF document text
    • http://files.silverdollardogs.com/uploads/1/3/1/4/131483391/wukivifiwopajij.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/1/0433/8499/5991/files/xikejuzunezipobogadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/89202438783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/60446056272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6310/8003/files/17344449069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/mk_vs_dc_universe_moves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedapefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/86107175561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/73924173027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/52172019478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/stedman_s_medical_dictionary.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_off00006d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3E 5732 bytes
SHA-256: f0675a9e5b73dd95d02c20ee2055e3f5a48e46275360b3ddae4cd1dbe40b6072
font_01_sfnt_off000080b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B7 10960 bytes
SHA-256: d620829f91ba5fe00156fabb24fb0749da9a6331a5a237484e768354d50b3880

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