Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7c9b7a4c8003da…

MALICIOUS

PDF

51.4 KB Created: 2020-08-14 08:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e5352bc668093a1299414150b51a20f SHA-1: 899107dfffac4a63013904b5fdf68de819578578 SHA-256: 8f7c9b7a4c8003da460cffcfba13d2fc5e097a835e9643aab9b00588f6c48fe2
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=grade%2010%20math%20trigonometry%20worksheets%20pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a PDF link farm heuristic further suggests a tactic to artificially inflate search engine rankings or distribute links. No scripts were extracted from this sample.

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/wb?keyword=grade%2010%20math%20trigonometry%20worksheets%20pdf In PDF document text
    • http://sabij.olbsfamilies.org/uploads/1/3/1/4/131407655/vegikituzejovirosi.pdfIn PDF document text
    • http://viluw.aloeverancl.com/uploads/1/3/1/3/131398140/gilarajepa.pdfIn PDF document text
    • http://dofediro.louisianaheartgallery.com/uploads/1/3/1/3/131383314/76f4a63d22.pdfIn PDF document text
    • http://files.musictostopthepersecution.org/uploads/1/3/2/7/132741081/mopimitenod.pdfIn PDF document text
    • http://rafux.purveyorhome.com/uploads/1/3/1/6/131607163/rijivivonol-nugenubu-bulejejud.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/1/0430/2651/4077/files/16338595687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/1898351737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/sekilav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7663/2217/files/dreamweaver_2020_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3567/2219/files/gefaposage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/sagenetelawolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/84502382653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/lorupazumeguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/buzipanixakutinile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3850/6146/files/jiresawofegusivagenaxanol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/52037323703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dofupuz.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 1

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_off00008886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 5908 bytes
SHA-256: 18b3c6089101fce3245716bdda4aa2da4e97d9025bc00f976f880956c6fbdc2e
font_01_sfnt_off00009ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA2 10448 bytes
SHA-256: 7244150a56648ad540b1acf9fc55a343cb89700aa4eed52d59475f496e360de9

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