Malicious PDF — malware analysis report

Static analysis result for SHA-256 931e36cabb425ee7…

MALICIOUS

PDF

43.4 KB Created: 2020-08-06 05:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4717fb33abcd2f3114e92d4c1506f934 SHA-1: 323d736a9f02de569ffec9d19c48cd4fc541ccb4 SHA-256: 931e36cabb425ee7cecb356384969819119615812a1bd0adf37c4c13477126d5
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'English grammar exercises pdf download' and a URL that appears to be part of a link farm designed to attract users. The primary malicious link is https://ttraff.cc/pify?keyword=english+grammar+exercises+pdf+download, which likely leads to further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=english+grammar+exercises+pdf+download In PDF document text
    • http://files.rhomis.org/uploads/1/3/1/4/131438216/51ce07c.pdfIn PDF document text
    • http://zetafode.lehoangbichphuong.com/uploads/1/3/1/6/131606027/764f44.pdfIn PDF document text
    • http://files.gentletouchcreationsministries.com/uploads/1/3/1/8/131856433/6d456af871.pdfIn PDF document text
    • http://files.storybookdelivery.com/uploads/1/3/1/3/131384025/f2f92512778f3.pdfIn PDF document text
    • http://files.carriedolan.com/uploads/1/3/0/7/130776864/9017134.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/1/0437/9151/5809/files/download_solo_leveling_novel_indo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/9148334676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/96650040265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2031/9893/files/35653888978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/satapizel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8717/4557/files/55445905990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2010/7428/files/40745032187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/vilarezesuzotomunanowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/32912273062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5760/1943/files/57129997861.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD6 5396 bytes
SHA-256: 2bb9572456b79d9c312494fd20a9953b1a89bdb9404fd84cfe53303bd3a2bd23
font_01_sfnt_off00006f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F07 10416 bytes
SHA-256: 5b9df6714234e9087ca814a8006b07e5362468e80020981b842247dd8373e9b9
font_02_sfnt_off0000927c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x927C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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