Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d81be39566a7bc9…

MALICIOUS

PDF

47.0 KB Created: 2020-07-29 13:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e57084287a71e851035788fa8e790ae7 SHA-1: a40f569a3b710bed9eed6b499d4a7ec68a9190fa SHA-256: 6d81be39566a7bc97c126c351ead3b4664ff587ba600e42b4c21ac66e64e4498
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, suggests a lure related to 'electrical engineering lecture notes', indicating a phishing or scam attempt. The presence of multiple SEO-optimized links further supports the attack pattern of driving traffic to malicious infrastructure.

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=basic+electrical+engineering+lecture+notes+pdf In PDF document text
    • http://files.easternsloperanch.com/uploads/1/3/2/6/132681404/3588728.pdfIn PDF document text
    • http://files.morristownsurgery.com/uploads/1/3/1/4/131483067/5554215.pdfIn PDF document text
    • http://files.youngoakmorgan.com/uploads/1/3/1/8/131871859/sixabamuf_lirok_dufajuxuwi_zaboriwowib.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/1/0434/4951/6199/files/ruvolunufudedapami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/kajizeseruwefoxeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/gibid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/ririnobigevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/62480426588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/jidutinuzajonupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/42594678164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/guzelufonosuberasuxez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5384/1560/files/kaxotixubegin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxolalinurijelibabozafod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4397/7366/files/22541628119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/89098273810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/toniseko.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_off0000793f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 5256 bytes
SHA-256: 214d6c6aef6c28cf5df2c24a332577bbea781cddd7246d8c30f1f0964ff87d14
font_01_sfnt_off00008b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1C 10284 bytes
SHA-256: 18984214f4752eb1df2b607b6db2783fe848f1915ef4fd9f0f2526da0aa64875

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