Malicious PDF — malware analysis report

Static analysis result for SHA-256 56edf04ed3dddbc4…

MALICIOUS

PDF

44.4 KB Created: 2020-08-09 11:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b9e2ae44b2c444e4a73f851b512dc2a SHA-1: 7ebc0e613e4c8d424c4dc5b5eefe17acbc13b39b SHA-256: 56edf04ed3dddbc46d464f310d99ccab32298cc7a9f41e517dc0177735b9127a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to other PDF documents, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=bruce+lee+s+fighting+method+pdf', is identified as a malicious redirector. 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/pify?keyword=bruce+lee+s+fighting+method+pdf In PDF document text
    • http://files.wilbanksreptiles.com/uploads/1/3/1/4/131407057/d84ce4.pdfIn PDF document text
    • http://files.paleolovecompany.com/uploads/1/3/0/7/130775655/2195273.pdfIn PDF document text
    • http://files.knoxsundridge.ca/uploads/1/3/1/6/131636941/dukuzidezuzupa.pdfIn PDF document text
    • http://files.davidpaap.com/uploads/1/3/0/9/130969475/c9cfde844a486b1.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/1/0434/6059/1776/files/90245525495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/the_attitude_seedbank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/physical_security_access_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/31041368742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7948/3044/files/jimogulejotabepami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/24946650011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3321/5644/files/makusasidomane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9529/3094/files/disadvantages_of_mobile_phones_in_points.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0074/2567/files/rikuragolitiripufazorut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6863/files/masenof.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 6

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_off00006be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE8 5408 bytes
SHA-256: 1b208b133b65704fbfb4a49f6e2ef6c5533032f04c7ff51873e2cd5b678601c6
font_01_sfnt_off00007e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2A 11256 bytes
SHA-256: dcb46c2e24454238680c4476d0085ebd8396ef8c0ab4d5e869ead782bc4231d3

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