Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f971a08ad7ec873…

MALICIOUS

PDF

38.1 KB Created: 2020-08-13 14:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7bbbe8fcd8c7d94459d42b434f52d58 SHA-1: 5e2187cd2d4d4b028a6a5add41cc5d2e86f80c78 SHA-256: 7f971a08ad7ec8737c83b03fed0ce74de8ca46aee1fb24aaab4826832ef26495
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to appear as legitimate downloads but redirect to malicious infrastructure, specifically `https://ttraff.ru/pify?keyword=castle+in+the+sky+piano+pdf`. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic confirms the intent to distribute potentially harmful content. While no scripts were directly extracted, the PDF structure itself facilitates the redirection.

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=castle+in+the+sky+piano+pdf In PDF document text
    • http://files.wadecolivestock.com/uploads/1/3/1/3/131382808/tilizidarisewu-bupemegar-rekumaruwew.pdfIn PDF document text
    • http://files.4chickstrailbags.com/uploads/1/3/0/7/130776485/4644860.pdfIn PDF document text
    • http://files.risingachievers.org/uploads/1/3/2/7/132712005/kerupesusizegasenir.pdfIn PDF document text
    • http://files.harmonizeyourspace.com/uploads/1/3/2/3/132302913/6922088.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/1/0429/9977/5381/files/38001683343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/52607772199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/66272570905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/57617730999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/93144443333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/fokafizerizomazisofawelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/78040203135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1668/2663/files/83762873752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/55213552531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3330/0885/files/socrates_quotes_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/59086039896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6599/4392/files/57772660490.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 8

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_off0000586b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586B 5104 bytes
SHA-256: 34578db5f7e99e0168ed6de1b536bacdb8e25f6f0fca0a1aa8f9ef216c0c8c35
font_01_sfnt_off000069c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C5 9928 bytes
SHA-256: 8ebfeb466be9fef0e10e59b666c6cf12937ae0cad6663f548003412b1360aac4

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