Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ca1802d81f0551…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 04:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 33b22f77f04ddfc256ae488c7e0d643c SHA-1: be3e0ad0ee6e8a6e8574cc3e01ae16dd994d60c9 SHA-256: c4ca1802d81f05515485518163960b228d96053f63f097f31032a3c6930d431b
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.cc/pify?keyword=ophelia+piano+sheet+music+free+pdf'. This suggests the document is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=ophelia+piano+sheet+music+free+pdf In PDF document text
    • http://files.stanbrubaker.com/uploads/1/3/0/7/130775918/5682043.pdfIn PDF document text
    • http://files.dollupwithteacups.com/uploads/1/3/0/8/130874009/b50fb092.pdfIn PDF document text
    • http://files.hinesburgnurseryschool.org/uploads/1/3/0/8/130874329/9653716.pdfIn PDF document text
    • http://files.coffsharbourmassage.com/uploads/1/3/1/1/131163635/wopigekaduvewigo.pdfIn PDF document text
    • http://files.torontopearsonlimousine.com/uploads/1/3/2/6/132683135/jubavurogexojoxi.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/1/0434/5197/3794/files/5883219778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8897/7813/files/dadiduvakutipige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/fibuvaxilivawafezuxivup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/63714604341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/xegur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/jegunuvixavenot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/87066310609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/66320001978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0173/3542/files/holt_physics_textbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/1996_dodge_dakota_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/20030247011.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_off000052f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F8 5424 bytes
SHA-256: a29a346c359983bd105cad274833ab94e1b755127c6717756dca4f917ca9d6ee
font_01_sfnt_off00006536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 14700 bytes
SHA-256: a2ed9a1c6f16adf2f0a5af106a99d8b9cd4cd8bf698a6af20edaedc90c8da1cc

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