Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aec9510875df2a6…

MALICIOUS

PDF

42.5 KB Created: 2020-09-25 12:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 006a46af4aadb030363ce01578ae957e SHA-1: 25a96265905966d6e21ecbcdf78549c595ec6043 SHA-256: 7aec9510875df2a61c669ee1ce9142a046cdb188860264896da506d5368a0051
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to redirector infrastructure, specifically identified as a malicious redirector and an SEO link farm. The document body, though heavily obfuscated, contains URLs that are also present in the heuristic findings, indicating a pattern of directing users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=mini%2030%20stainless%20review In PDF document text
    • http://files.thehumanfactorpr.com/uploads/1/3/0/7/130776275/jasag.pdfIn PDF document text
    • http://ruvurupi.gastrocycling.com/uploads/1/3/1/3/131380485/muzepasebez.pdfIn PDF document text
    • http://gepuzuta.wacooutdoorkitchens.com/uploads/1/3/1/6/131636665/madip.pdfIn PDF document text
    • http://vakiki.feliciakeesing.com/uploads/1/3/1/4/131408738/9cd4e37.pdfIn PDF document text
    • http://pofadiva.jwhitneyart.com/uploads/1/3/0/7/130775565/2726583.pdfIn PDF document text
    • http://files.lizastories.com/uploads/1/3/1/4/131406698/2353052.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/1/0428/5313/8588/files/gilorivadoturajoxomud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/68936327938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/apache_license.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/astm_paint_and_coatings_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/closed_syllable_worksheets_for_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0238/2494/files/monitorear_red_local_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/43514806783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4592/0672/files/nerax.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 8

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_off000068b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B9 5144 bytes
SHA-256: c3c43314b37b864ff43bf951d5c9f6ece8d9dfeaea6144ae2a09de47ef7d64a3
font_01_sfnt_off00007a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A62 10216 bytes
SHA-256: e15abb56580d581723252b58a82969687ee61df9e716087aed07f6e9a4a78558

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