Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fd181416b603cc…

MALICIOUS

PDF

42.4 KB Created: 2020-08-15 06:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d767851c0fc799a0254611e24d5b047 SHA-1: 18180981f8cc0f81070f77b99d628d6ab54ebf89 SHA-256: 72fd181416b603ccfc4d3f7a138a676bd73eef0065b7fa46a2f16b959074d501
194 Risk Score

Malware Insights

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

The PDF contains a deceptive lure related to 'Clear blue ovulation kit instructions' which redirects to a malicious SEO link farm. This indicates a phishing or scam attempt, likely to lead the user to a compromised site or further malicious content. 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.ru/wb?keyword=clear%20blue%20ovulation%20kit%20instructions%20pdf In PDF document text
    • http://neluwemon.surfcoastarts.com/uploads/1/3/0/8/130874523/4117318.pdfIn PDF document text
    • http://files.fromthelighthouse.org/uploads/1/3/2/6/132695472/682935.pdfIn PDF document text
    • http://files.reclaiminghopecounseling.com/uploads/1/3/0/7/130739835/toledo_zagazimo.pdfIn PDF document text
    • http://files.bwilcox.net/uploads/1/3/2/7/132740951/tobosor.pdfIn PDF document text
    • http://files.antonio-oliveirafilho.com/uploads/1/3/1/3/131384424/5974434.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/1/0435/1184/0927/files/high_school_graduate_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/77211566348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/cours_de_chinois_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/92095105040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/64037282786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7465/8197/files/64764980765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/gujoles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2925/6613/files/49593708924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/gufulunekinepale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/cambridge_igcse_maths_student_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/convert_word_doc_to_fillable_free.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_off00006695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6695 5320 bytes
SHA-256: 3c9b6eeace07b8923c226e0ae99ff3736460db3d8f4c61a5e9fe157aa5cfde88
font_01_sfnt_off000078b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B7 10416 bytes
SHA-256: 045e678b572a1a5971b5d8833d90fb6cc91592a59ede43b92c0e4d39f80b6f19

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