Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c4618d3904a91b…

MALICIOUS

PDF

37.0 KB Created: 2020-08-02 16:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d3baa1c0e38eb2de3dce3b29deecedb SHA-1: d587b3ea2607b1900d358254805ea43215e338eb SHA-256: 23c4618d3904a91b9a5fb0a21118b5db912d31e4a97c6d61d56586ff0ad54052
194 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure. The document body text, though heavily obfuscated, appears to contain the same URL and references a repair manual, suggesting a lure. The presence of a malicious redirector link indicates the intent to lead the user to a harmful destination.

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=2004+pontiac+grand+am+repair+manual+pdf In PDF document text
    • http://files.generaldrilling.com/uploads/1/3/1/4/131437091/60367126750025f.pdfIn PDF document text
    • http://files.beclewisfiction.com/uploads/1/3/1/3/131379564/7983283.pdfIn PDF document text
    • http://files.manhattangreensolutions.com/uploads/1/3/1/4/131454420/1067876.pdfIn PDF document text
    • http://files.leapinghound.com/uploads/1/3/0/9/130969176/xozunusej.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/1/0434/0406/6967/files/88335104299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2439/1067/files/37194524715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70474217151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9141/8526/files/nujerulofuwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/xujifuxowarisixiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/38171039793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/jisunolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/66735216263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/45438410070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0522/0763/files/gibotivafufowajubuwevama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/9371657391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5238/3902/files/depenolunir.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_off00005265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5265 5564 bytes
SHA-256: 3b947ee4635a5deebd8ec9a6a57599d5c4e7d8976d474314dbb2607d154c34dc
font_01_sfnt_off00006545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6545 9956 bytes
SHA-256: 9f8f95cd3bbe1832ec0c0d3d42fe874030e30c7c3d092d80775767d4965848bc

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