Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c904369860528ba…

MALICIOUS

PDF

46.6 KB Created: 2020-08-06 19:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb682e6ace2bf8b2d134c6afb30b6fbc SHA-1: 1580e7aacb5500afbf1a5fc39a25c0583ca6bb8f SHA-256: 1c904369860528ba8935c974ac1be45dec6817a1c9f8b0df344257cfd5e77cee
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to ttraff.cc, suggesting a link farm or redirection attack. The document body, though partially garbled, includes text related to a book PDF, indicating a lure to encourage users to click the embedded malicious links. The ML classifier strongly supports the malicious verdict.

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=capitalismo+socialismo+y+democracia+libro+pdf In PDF document text
    • http://files.readmoredaily.com/uploads/1/3/1/1/131163563/6ce55d9.pdfIn PDF document text
    • http://files.darylgove.com/uploads/1/3/2/8/132816165/1972985.pdfIn PDF document text
    • http://files.maskcarabeautycolormatchgina.com/uploads/1/3/1/6/131637477/5485515.pdfIn PDF document text
    • http://files.columbiadentcenter.com/uploads/1/3/0/9/130969910/jubegonakajij-desagomabof-sateno-pikilolot.pdfIn PDF document text
    • http://files.ccevansville.org/uploads/1/3/1/4/131453051/vapumujemojux-delunakoduwune-rilagilekesibe-jiraruzijo.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/1/0429/8693/0329/files/jelezamepozikilevedurizep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/notoxafilanunozujelexeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/60182556461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7732/7265/files/19121011801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/suvifazadeloda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/34296165147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/coordinate_geometry_basic_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/65505199664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/48425730984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/bebofefen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/94822652005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/92522940245.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_off00007471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 5448 bytes
SHA-256: 63d42556cc9325b2c038b2d06506bbf2fe470afb3e42e864e718f68ef8e6497e
font_01_sfnt_off000086dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DC 11300 bytes
SHA-256: 722f76dfa82622d1d529c14e66644d4e5600e7ca222916290784a2a7eb880e08

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