Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fe1703bb849b6d…

MALICIOUS

PDF

46.5 KB Created: 2020-08-11 02:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8511475a7e359203c21839ecaf2fbc38 SHA-1: b7b31c38a198bc2f763d8fe8c20803c25f3e120f SHA-256: 76fe1703bb849b6d2fb247f667e3e7a373c2dccb8d97b127177642a7b71da5c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body and heuristics indicate a link farm strategy, likely to disguise malicious intent or for SEO poisoning to lure users. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is part of 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.com/pify?keyword=international+journal+of+bifurcation+and+chaos+pdf In PDF document text
    • http://files.centerschoolpto.com/uploads/1/3/2/6/132681229/nesojuv_ropaj.pdfIn PDF document text
    • http://files.colesworldofmathematics.com/uploads/1/3/0/7/130738988/59da8909453.pdfIn PDF document text
    • http://files.mwnarchitect.com/uploads/1/3/1/8/131857916/vixekaxuten.pdfIn PDF document text
    • http://dokekoso.clonmanygenealogy.com/uploads/1/3/1/4/131407440/vafuwimexo_xetesabuzowek.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/1/0431/6656/4507/files/78860641922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8353/0394/files/dibaviranadadafulikowuwaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/verarosuparekiladavib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3970/9589/files/billie_eilish_i_love_you_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/283821937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/62421963354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/ketobikulufofegizokot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4877/8400/files/diagnostico_de_anemia_ferropenica_en_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/puwajipegelos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/desobavalusod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/noradenogegemuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/baguzapaju.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_off00005fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 3796 bytes
SHA-256: 0a8a4da6e2989cf50a15471f3a558a9e53d5a4fe9f5ef0f7b32c500257f8b594
font_01_sfnt_off00006d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2A 5396 bytes
SHA-256: e0dc62512c0a90874c8f64764f621036d434b4c0c4806eaf529b8ba05169e6cf
font_02_sfnt_off00007f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6F 14284 bytes
SHA-256: 1a5b56abec012c2ce22c71dd0d39c750ce999a671d49d42eb06f22c293697d4d

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