Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09b689ee43ebee3…

MALICIOUS

PDF

55.3 KB Created: 2020-08-09 11:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb5b6161b5c3fffb7ccf7960c7fda313 SHA-1: a14d20b3ee0c82868acb96a17079bee4007469ce SHA-256: b09b689ee43ebee36db12b3a410e2e1ab2a513d492dbbb06a099bd00ccb0eb36
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded URLs. One URL points to a known malicious redirector, and the document body includes a mass of external links, suggesting a link farm or SEO manipulation tactic. The primary intent appears to be directing users to potentially harmful content through these links.

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=apache+tomcat+7+tutorial+pdf In PDF document text
    • http://files.prostatecure.ca/uploads/1/3/1/0/131071209/5825414bc0f60.pdfIn PDF document text
    • http://files.effinghamelementary.org/uploads/1/3/0/8/130813427/nalofezidi-xosojozofuwa.pdfIn PDF document text
    • http://petirugo.barklowclasses.org/uploads/1/3/1/1/131164250/litub-denaginem.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/1/0435/2763/5095/files/mastering_physics_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/chicago_building_code_violations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2831/5293/files/81499327900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/mankiw_macroeconomics_9th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/relidonejif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/moluxibinupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5864/0549/files/concepto_analisis_foda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5497/3606/files/60054154362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/74186563039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/zepomobuwoduli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/fiselekamoxorenid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/97295260199.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
🗂 Part of campaign: effinghamelementary.org 9 samples

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_off00009b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B22 5288 bytes
SHA-256: 9b72d1108d561cb09362b211c905111a7e8fa2be91eb1ffc052d0dd33e1210ec
font_01_sfnt_off0000acfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACFC 10280 bytes
SHA-256: 454243c44de47dc1ec9c9c3e7ca0cfb8f256973051918499b0b119a7ef53cc08

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