Malicious PDF — malware analysis report

Static analysis result for SHA-256 829535f928c1a8e3…

MALICIOUS

PDF

39.4 KB Created: 2020-08-12 15:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff3adc5d9143bd64e5baa0804fa5619c SHA-1: 1e868bc1aa0a95c89e46fc1814a63ca0c78630d9 SHA-256: 829535f928c1a8e381a42cc0a6913bf4d14dff9713c2cf5b00c2211d04be2949
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to an SEO redirector designed to trick users into downloading files. The primary redirector URL is https://ttraff.ru/pify?keyword=accident+and+emergency+radiology+a+survival+guide+pdf+download, which is associated with malicious activity. The document body, though heavily obfuscated, also contains this URL and other links to potentially malicious PDF files hosted on various domains.

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=accident+and+emergency+radiology+a+survival+guide+pdf+download In PDF document text
    • http://files.johngetsmariad.com/uploads/1/3/1/6/131637009/74e9d18ec86f14d.pdfIn PDF document text
    • http://files.fringeelectronics.com/uploads/1/3/0/9/130969703/debixipuke.pdfIn PDF document text
    • http://zigurom.the1000monkeys.com/uploads/1/3/1/3/131380429/1822582.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/safowonevarusudijuzano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/xilotovijoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/zupivazuwivekugemuwuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/dedicated_clean_ballast_tanks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/rezozozexeten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4429/1228/files/51435495451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3051/8682/files/50235879741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/xefeserakijunogovobiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/16567713016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/51274026494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/44884984043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/sazefomagurem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/176335064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/xarofifovizaxu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA8 5600 bytes
SHA-256: 448544067a0a5abc4f93170421f544a7b8ab4b7cf3fd4080005efaab1cf4d312
font_01_sfnt_off00005fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA4 10124 bytes
SHA-256: 6c9c0ffd065e815440b6e7571a0ca15d4bb75dcee2b31a7c97b5bf089d1ba164
font_02_sfnt_off000081cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34