Malicious PDF — malware analysis report

Static analysis result for SHA-256 d815c8969056442e…

MALICIOUS

PDF

33.1 KB Created: 2020-08-14 19:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 248ef7b228795d3b98a834e2a0e79fde SHA-1: 231188ff6580b9fd4667380317cebd7d7574f3e6 SHA-256: d815c8969056442e341ba802bcf5cf0455bafc39b36c0d0237660e2e2ac794b8
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=rhapsody+in+blue+clarinet+solo+sheet+music In PDF document text
    • http://files.spinna.org/uploads/1/3/2/6/132681559/fc7610adbfa9de0.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/1/0436/9219/5993/files/nitagozutiwajezuvitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/advanced_ankle_strengthening_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/17558176110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/42012063075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/72166658986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/7895/5687/files/amelie_piano_easy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/74072948947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2208/2460/files/35594764753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4797/1990/files/mipiroxexosemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/42644792668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/xulewutewali.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_off000043d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43D1 5560 bytes
SHA-256: 969868aba90b4f6c83c5e213ac7de4cde13f0dab0b3a85a68b16606fd9ac7048
font_01_sfnt_off0000568d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568D 9668 bytes
SHA-256: 869090a74aa48ca001c2ded7b1509df0bb5997708070ff5015b448ff9f78a7af

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