Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84fdb3caf69c49d…

MALICIOUS

PDF

35.6 KB Created: 2020-08-06 17:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf8a498db0e6ff12bf611af78c20902f SHA-1: a98b595efb82302e3b4629b72248503420b960a9 SHA-256: c84fdb3caf69c49de75e20fbca3ac344d7a47e40eb844142ee07dc6c065f62a6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to PDF conversion, suggesting a lure to trick users into clicking the malicious link. 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=convert+pdf+to+word+using+adobe+acrobat+x+pro In PDF document text
    • http://files.puregoodnessmn.com/uploads/1/3/2/8/132814050/donovimapekuz.pdfIn PDF document text
    • http://jazuba.starlightsarah.com/uploads/1/3/0/8/130814238/90a29c8f4.pdfIn PDF document text
    • http://files.travelblogonline.com/uploads/1/3/0/7/130775862/binavanogumelob.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/1/0436/2105/6672/files/72691251046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/wow_how_to_install_addons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/toges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/toro_timecutter_ss5000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/57017534648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5392/1957/files/86132009150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/7605896112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/gorojofimafupeminakuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/zavuzowutezipoxazilawosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/magaseve.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 4

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_off00004c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C10 5556 bytes
SHA-256: be15b606cd0d450a49162c912a17e624c7110aa7be0b69e4ef7030838dca6d0a
font_01_sfnt_off00005f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 10136 bytes
SHA-256: 8d7e3f886434c14ebcd8afb2a454baa7e7a92f761730a73f3673dfff77cc344c

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