Malicious PDF — malware analysis report

Static analysis result for SHA-256 863efc91efbf78c2…

MALICIOUS

PDF

57.3 KB Created: 2020-08-20 11:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fdff271fc2ccb6a8350d427512b0a4eb SHA-1: 05ef8faf97771f5a1cf6ac5e2c214168fe18a4ef SHA-256: 863efc91efbf78c28ba1f4a907b8fcd21974d3b8106b136d1cf2a804df697e89
202 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a malicious redirector, disguised as a "Kanken laptop size guide" and a fake invoice lure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO manipulation tactic to distribute the malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document body and malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=kanken+laptop+size+guide In PDF document text
    • http://xukimo.wackesfamilyhistory.net/uploads/1/3/2/7/132712593/nirugi-bokepisinimu-fugufomifo.pdfIn PDF document text
    • http://wabisiba.ildanceofficials.com/uploads/1/3/1/6/131606289/fejor.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/1/0437/3915/2535/files/85347424132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9671/0047/files/aisthesis_jacques_ranciere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/livro_aromaterapia_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9440/8357/files/22085607973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/dabuwaxivimoxiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/burial_rites_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/nubosoxovokujesuzovaxara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/3025160254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/cardiac_catheterization_patient_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5505/3989/files/vakobawajifiduzarerulab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 21864 bytes
SHA-256: 103340631dcb9a9cade5ff9a833b5265ba4180d7b4f4d7dd007289b97795d21f
font_01_sfnt_off0000a21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA21E 5116 bytes
SHA-256: 15d4a61c6c8e825015f41e5c29c7da891236e46bdef26ab86a93ab0f16152f90
font_02_sfnt_off0000b39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39B 10740 bytes
SHA-256: 7432ecdfba468ebb355410e89b171e74b53f8ce9ff45ae02bc5c559dd9cd4979

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