Malicious PDF — malware analysis report

Static analysis result for SHA-256 437c8599856962c1…

MALICIOUS

PDF

36.2 KB Created: 2020-08-18 17:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2672159accbd8ba1fb870941f7898176 SHA-1: d4bb64ec7fec6fc274bcbd8cd5158c43bdea166e SHA-256: 437c8599856962c17b2f8e3d8a1abd1117be28895fb6946c54e88c5c2b3eacef
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a Pink Floyd piano sheet music anthology. The link leads to a known malicious redirector infrastructure. The document also contains a large number of links to other PDFs hosted on Shopify, likely as part of an SEO spam campaign to improve search engine ranking for the malicious content. The ML classifier also strongly indicated maliciousness.

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=pink+floyd+piano+sheet+music+anthology+pdf In PDF document text
    • http://files.prestamoscreditoetc.com/uploads/1/3/1/3/131379636/bevuxegu.pdfIn PDF document text
    • http://jujalafa.teckmanart.com/uploads/1/3/1/3/131383791/6fbc21fd3c.pdfIn PDF document text
    • http://nugud.nbptwedding.com/uploads/1/3/1/8/131856655/f44c418d4d8a7bd.pdfIn PDF document text
    • http://palowib.tinmanministries.com/uploads/1/3/2/7/132740580/7454992.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/1/0437/7142/9015/files/causative_exercises_advanced.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/can_we_run_android_os_on_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/girux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/how_to_download_a_font_to_photoshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/bba_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8340/6243/files/business_analysis_and_valuation_using_financial_statements_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/bojuposojulaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/silver_surfer_cartoon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/lugediz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/punctuation_exercises_with_answers_grade_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/limisilejexetarosadafavu.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 3

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_off00004ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF3 5640 bytes
SHA-256: 23941bbab9649575e98a0a59a78f65761410573cbfb1f5d5c0c425b6b02154b9
font_01_sfnt_off00006210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6210 9816 bytes
SHA-256: b735db5fdabe1dee3fd5d6b3b286be7cfbe05d82d4d7e43f6a2624dc3d2ac9ce

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