Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a38fce05b8fb31…

MALICIOUS

PDF

54.9 KB Created: 2020-08-30 22:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea49372988689ef7832d805bbb3add5e SHA-1: 96a77634f92d9a094ee9db2affdca175d0a67a56 SHA-256: 25a38fce05b8fb311a4bec5558f9aeb38bd335d229625e6cfd27836b617b96ec
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'easy disney piano sheet music' and the malicious URL, suggesting a lure for users seeking free content. The presence of multiple external PDF links, many pointing to Shopify, indicates a link farm strategy to improve search engine ranking and distribute the malicious payload. 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.cc/wix?keyword=easy+disney+piano+sheet+music In 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/1/0439/5086/6590/files/45140349245.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jobevemavesofidubuxiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/47595396856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/rocas_sedimentarias_quimicas_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/83403162755.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b6749ae73bce4fd8b2c312012ea23b8c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bfbc46_6c1279a265a3494293599a27b065b405.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8ffb51f4d6df4c81883c0a56039f58f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1108c_26ddc8ca5de34184be56bb8e2247381f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/gesaxelibij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/madden_nfl_19_ultimate_team_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3068/2519/files/majarogavogevebez.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7865 5244 bytes
SHA-256: 8dba3ecca4f5885ba430ee9683a5e9ca9f7df4d24738792cb81f3c7ec1a618a4
font_01_sfnt_off00008a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A19 14920 bytes
SHA-256: 18b5ada5af750e7a66f162e2409131b6006a0f61ff3c5dd4d7037577fcea26a6
font_02_sfnt_off0000b9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B7 16232 bytes
SHA-256: 1d4ebd634e9a4b1afc3ba2e660f7abdbad7ecfb3c20c2fb0daf688bec4f9a1d5

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