Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4300ede90c76c6c…

MALICIOUS

PDF

34.7 KB Created: 2020-08-08 10:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c519074f37333a2643104c44ade4d28c SHA-1: 3c0efb5f6b5f7d843d52c36fd14c669392cae670 SHA-256: b4300ede90c76c6c3a8324624f93f006e61beb62f8a9a4784ab0ff16de2cc2ee
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, likely intended to lead users to malicious content or to manipulate SEO. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.com/pify?keyword=analysis+and+mathematical+physics+pdf In PDF document text
    • http://files.thepowerofampersand.com/uploads/1/3/1/3/131398204/779c45db630eb.pdfIn PDF document text
    • http://files.ktplanning.org/uploads/1/3/1/8/131871980/pigiwufimel.pdfIn PDF document text
    • http://kuneguro.greatnwsoupcompany.com/uploads/1/3/1/4/131453540/1881673.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/1/0447/5568/1431/files/sheet_gauge_thickness_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8394/7427/files/ae_1_canon_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4834/3464/files/national_achievement_test_reviewer_for_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/posefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/pafanefavuzexezobuvita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/bufozajosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/59470944133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/oxidation_of_alkenes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/jolapobijetopexubob.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 5

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_off000049e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E1 5392 bytes
SHA-256: a1f2d62d78f5bfb6f59116630b9058bcb2887a4be06bbad305f8a3dda5414820
font_01_sfnt_off00005c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C20 9996 bytes
SHA-256: 41a7ff6195b3be0f3f459554ecc9cd6c87607958431dd57fd85541288a9121af

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