Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89f2b82420972c9…

MALICIOUS

PDF

32.6 KB Created: 2020-08-15 13:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37ff58ee0873419ed780405b5785a71f SHA-1: 5c7280b1f7acc75af6f117d28cc1b439f0f60ca0 SHA-256: f89f2b82420972c9c92b8a8caf8084bdae1a8e28652ca97e83f2fe151d8f11d6
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to improve search engine rankings for malicious content, ultimately leading users to harmful sites.

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.cc/wb?keyword=first%20and%20second%20conditional%20exercises%20pdf%202%20eso In PDF document text
    • http://files.perfectlyimperfectcollegian.com/uploads/1/3/0/7/130739780/741ee4126c70ce4.pdfIn PDF document text
    • http://fimujok.leavesbyjenney.com/uploads/1/3/1/0/131070450/kitew.pdfIn PDF document text
    • http://xozafez.aei.agency/uploads/1/3/0/8/130874038/ginalebutupolinirev.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/1/0430/8310/4409/files/kowopajatoliputamijezob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3233/6792/files/branches_of_philosophy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/core_java_basic_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4455/0294/files/soxemubugiwakipesanefal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/83360474446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/88106727778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/bujimetatipabevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0306/8068/files/ancient_china_civilization.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0184/6692/files/hannah_arendt_trke.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 7

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_off00004332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4332 5304 bytes
SHA-256: 5b0b622f5ee8078afd82fe0b21abf9bcf93d905e1a061e931b828abd3afdb71e
font_01_sfnt_off0000554c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x554C 9380 bytes
SHA-256: b58ab2e764b04efc160e5958b72df8868b2321ee754fadfe235a7128439a493a

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