Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2575db5c2a0240…

MALICIOUS

PDF

37.3 KB Created: 2020-08-18 15:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e851fce4e648ad0448e46ec9ae30261 SHA-1: 192be9c07fa349cf972031d1bcadead719a41037 SHA-256: 5f2575db5c2a0240abce7f5470626aabde4d3b884feda6b0c5d105916e3c6c06
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector designed for phishing lures. The document body, though partially corrupted, mentions 'Free arabic music ringtones', aligning with the SEO UTM redirector heuristic which indicates a phishing attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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=free+arabic+music+ringtones In PDF document text
    • http://xuvodobu.mindandhomeinsurance.com/uploads/1/3/0/8/130874359/73b91ef.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/1/0440/0375/4142/files/paul_g_hewitt_conceptual_physics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaxesajikibulunetegidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4810/6134/files/79850433277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/nugameja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/22428835673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/5709952625.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 1

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_off000055eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55EB 5180 bytes
SHA-256: 0f0e98f2c79d888274e1503a2410d3e79db847763f236b68ba61af39d9cb17ce
font_01_sfnt_off00006774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6774 9816 bytes
SHA-256: 4452ee37be27875cb98a5a3f0b4baf695c3d75fa9ca156c7bbaca7a657be9e92

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