Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca5f9266e37a2dd…

MALICIOUS

PDF

41.6 KB Created: 2020-08-25 21:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb26f23742e688104e492bbb8b947f25 SHA-1: 32b6ce3315956ca9ad0a0f15c9cd5d2abb2de887 SHA-256: 0ca5f9266e37a2dd0ff1cb041264e6cf3f7c273fc0a872d0c412d4454d0c538d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs pointing to redirectors and a link farm, indicating an attempt to direct users to malicious content. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/pify?keyword=oak+bandit+poe as malicious. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs that appear to be part of a link farm.

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=oak+bandit+poe In PDF document text
    • http://zipejisuk.richmondbulldogs.org/uploads/1/3/1/4/131438110/d5edfa380.pdfIn PDF document text
    • http://kuxoxukiw.cjcsconventions.com/uploads/1/3/1/6/131607131/2048797.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/1/0438/4561/5766/files/vabodotimatidarekinako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/18930700683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/59738247852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9245/1235/files/sunabutabisadazil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6069/6990/files/chemistry_7th_edition_mcmurry_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/addictive_personality_traits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/34127572292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/walowuliguwusodudifawixem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/bharathiar_university_syllabus_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/baazigar_film_song_pagalworld.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/imf_2019_report_on_liberia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/4383/1198/files/45557743251.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_off0000663f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663F 4876 bytes
SHA-256: 51d5310a79e294f6e3b65f176f945fdcae42656bf8a94d6f9fc2766d5fcda184
font_01_sfnt_off000076e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E3 10288 bytes
SHA-256: 5a60d1febd65062060a134fc1ae880456857356fc77371f0e0920d77072ec1c0

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