Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66ea466d93e07fa…

MALICIOUS

PDF

99.4 KB Created: 2020-08-09 13:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92d102433886c1c71255b8fd7929b1ab SHA-1: 454f5bd82aea873ad9a719d8566132840cfac9f3 SHA-256: a66ea466d93e07fa6733221ecbb91c89c6f9ceca279c84abc099e968ecfa771d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL which is likely used to redirect users to a malicious site. The presence of numerous external links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=les+neurones+de+la+lecture+pdf In PDF document text
    • http://files.jennadmassage.com/uploads/1/3/0/9/130969469/7645109.pdfIn PDF document text
    • http://tabisi.emmamaitland.com/uploads/1/3/2/6/132681513/c2a0bfa8b87f.pdfIn PDF document text
    • http://zirazolo.msjacksonsclass.com/uploads/1/3/2/7/132712207/21b58410395.pdfIn PDF document text
    • http://files.lexcoffeecottage.com/uploads/1/3/1/1/131163684/9087941.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/1/0437/1120/1435/files/78761317120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/recessive_epistasis_ratio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rewitetesekumipepejeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/kukaduxufikujemufaruzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5339/0741/files/49874287814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/jquery_crash_course.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/42870346171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/ruvijem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/sepifasat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95181885481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/67248469917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/xijofe.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 6

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_off00013463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13463 5092 bytes
SHA-256: 5da8f33acf2cec997d6a0cd49e0359478f7fc37cadca629f31916b38ef9a9ed4
font_01_sfnt_off000145c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C2 19532 bytes
SHA-256: c85f525407eeaf402eaa9517a2d32fcf2f20d225f72a368f6a3a897e99548a03

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