Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5b541265dfce8c…

MALICIOUS

PDF

43.3 KB Created: 2020-09-17 07:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b9587b53d8d2ddfec80b430819f50e9 SHA-1: b11e059c21b85f61db95a51586a30dadc2f5bf62 SHA-256: 0a5b541265dfce8cb8d608ee5289b8fd6f5074124e6919f9f1002b91234cbc49
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.club/wix?keyword=algebra+1+cumulative+review+answer+key'. The document's structure suggests it is part of an SEO link farm designed to lure users with seemingly relevant content. The ML classifier strongly indicates maliciousness, and the presence of redirector links points towards a phishing or malware distribution scheme.

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.club/wix?keyword=algebra+1+cumulative+review+answer+key In PDF document text
    • http://files.decor-boutique.co.uk/uploads/1/3/2/7/132712530/51c3439ba.pdfIn PDF document text
    • http://jogazab.tucomghhs.com/uploads/1/3/1/4/131482993/vaviruwifope-tewoteferawuw.pdfIn PDF document text
    • http://files.gudrunhodge.com/uploads/1/3/1/4/131437149/1640011.pdfIn PDF document text
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdfIn PDF document text
    • http://dudox.activeinitiatives.com/uploads/1/3/1/6/131606289/xegakodibinufep-kevagebutetar.pdfIn PDF document text
    • http://openstaxIn 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/5903401900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0700/7127/files/24564525615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/gofotapaxotumami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4874/6651/files/70380814758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/25865165259.pdfIn PDF document text
    • https://1900281f-d5ab-4bf1-bc77-e9039ceb1a3b.filesusr.com/ugd/ad2ade_367d1805f9cb45cc999e348d86dcc333.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/sogito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/jezukebonovapomukez.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_off000060bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5616 bytes
SHA-256: 2eecc4e843b13cd7f04eeb23666261d96a7185a91c62e53ffd7869aea96eec0a
font_01_sfnt_off000073e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E5 14108 bytes
SHA-256: 09aaa7635152539f0bcbf754dc01aea6e92ad1f9fa432fd295204d900e267df1

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