Malicious PDF — malware analysis report

Static analysis result for SHA-256 8431b6e0b94352fc…

MALICIOUS

PDF

41.6 KB Created: 2020-08-02 12:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 703b71c4e0d7feb8ea1ce6f2797060a0 SHA-1: f3d6fefb8025510709cd1d9ac7452c8900ed48a6 SHA-256: 8431b6e0b94352fc28e0ff23ca7e6cfa33e2fc9e6701d5c516a3e3eceedfd7f7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm and a specific redirector URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to potentially malicious redirectors reinforces this assessment. The document body text, though partially obfuscated, mentions 'Black and Decker weed eater' and includes the malicious redirector URL, suggesting a lure for a fake download or offer.

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/pify?keyword=black+and+decker+weed+eater In PDF document text
    • http://files.truelifealive.com/uploads/1/3/0/8/130815026/tuxajabeka_mitinirezoxegux_jojodu.pdfIn PDF document text
    • http://files.phoenixunionindoor.org/uploads/1/3/1/3/131382243/3345855.pdfIn PDF document text
    • http://files.sidneyshelbychamber.com/uploads/1/3/1/4/131482997/3650357.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/1/0435/8832/1443/files/97043261378.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/xobujakixovofoxodepines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/14554998303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/43166666337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/39902141071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7250/files/17711263147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/tevoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/xizosalarizewuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1045/6730/files/handicap_placard_ohio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/58645031015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/wirasolofenurafija.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_off0000634e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 4960 bytes
SHA-256: 2786dff4c2c679aedd3d1ac726d79344b0bba201e1b805d8d08808b60664019a
font_01_sfnt_off00007452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 10940 bytes
SHA-256: 416bef3dcf304569f98eccb6c9ff85d7b272cb26ce12087671a66d30d75d845f

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