Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8e1426b65ff8c5…

MALICIOUS

PDF

47.0 KB Created: 2020-10-01 17:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 03b92cffc375439b189d943114f9cf47 SHA-1: 4347e76113edce74e10101aac029473a3241e820 SHA-256: aa8e1426b65ff8c50c74e18bffeb7a90700d045e96c5ca2859bb075f08d56990
194 Risk Score

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://cctraff.ru/strik?keyword=an+inspector+calls+responsibility+quotes+pdf In PDF document text
    • http://files.jeremyboros.com/uploads/1/3/1/8/131856554/zitakegi-bopaperevoz-saguwafadi-kalonixoxu.pdfIn PDF document text
    • http://ruseliv.seomid.com/uploads/1/3/0/7/130739693/8146673.pdfIn PDF document text
    • http://files.htftaiwan.org/uploads/1/3/0/9/130969808/taxuw.pdfIn PDF document text
    • https://site-1039638.mozfiles.com/files/1039638/3734256085.pdfIn PDF document text
    • https://site-1039385.mozfiles.com/files/1039385/fipikatatiwozuboxeloruzox.pdfIn PDF document text
    • https://site-1039215.mozfiles.com/files/1039215/sunaweduwugiwiwusuju.pdfIn PDF document text
    • http://files.sammamishperformingarts.org/uploads/1/3/1/3/131383604/tatamew_tolegapi_pevoxusifajisoj.pdfIn PDF document text
    • http://senigig.stevenconn.net/uploads/1/3/1/4/131407498/7576917.pdfIn PDF document text
    • http://files.csulbmie.com/uploads/1/3/0/7/130740571/4819928.pdfIn PDF document text
    • http://files.thewaveindustries.com/uploads/1/3/1/3/131398094/15d130eb16.pdfIn PDF document text
    • http://files.fragletsart.com/uploads/1/3/2/3/132303337/7508694.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/1/0433/1244/7652/files/xelsis_espresso_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2994/5758/files/julasovoxaxuratijez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7637/2630/files/tomowekomapadurakim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1054/6074/files/neliwakisetibulojiloraf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 5504 bytes
SHA-256: a752d061e8de98f68a455ace6bd4acc25fe002f3c9454fdae5a628b80b051451
font_01_sfnt_off00008381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8381 13656 bytes
SHA-256: 03b7551593797b8e3f4002699c34ba8a1c0676859f8f641e6c0ee3036e4538cf

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