Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f61d5169a8e14d6…

MALICIOUS

PDF

54.1 KB Created: 2020-07-26 12:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 79960785bfc4bfcadc7fcc41efcb44f3 SHA-1: 1a5c3cf21f049c4af5e9b3bb53b378c7f208536b SHA-256: 5f61d5169a8e14d6282530904c140e57e57986c8954059b52bdef13994f13997
194 Risk Score

Malware Insights

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

The PDF contains numerous links to redirector infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to academic materials ('Kryminologia ksi kki pdf'). The primary malicious URL identified is ttraff.ru, which is used to redirect users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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.ru/wb?keyword=kryminologia%20ksi%C4%85%C5%BCki%20pdf In PDF document text
    • http://files.atkinson-sports.com/uploads/1/3/0/7/130738852/pujajofatopag.pdfIn PDF document text
    • http://files.eceti.org/uploads/1/3/1/8/131856353/lisomag.pdfIn PDF document text
    • http://files.jenidahn.com/uploads/1/3/1/4/131453365/29153ea.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/1/0433/4141/4552/files/tazuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/pomogakedaxibif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/bofagizorodajobadufiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/71312956426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/68218656651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/43775487563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/78176401044.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 3

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_off00009261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9261 5420 bytes
SHA-256: 5ec839277625096ca2251d94ccd1ef5904db16162bfdf0da055b29faa62e95db
font_01_sfnt_off0000a41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA41A 12132 bytes
SHA-256: 1ca05c6e74c1d3529e5e2d8faf3de0d1bbdafea4141766cc75c3b5d9e346c2dd

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