Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af34310249c1451…

MALICIOUS

PDF

39.1 KB Created: 2020-07-26 12:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9a8bc4961245f3c55b5c3053696c2ee SHA-1: e0f917240536d85aaa28141c71208838ae9e41ac SHA-256: 7af34310249c1451f94ea2a16b9048e5ea5e3f158dd3eae71ee1e8c4bf0bd577
194 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links that redirect to known malicious infrastructure, specifically a redirector at 'ttraff.cc'. The document body, though heavily obfuscated, appears to be a lure for a 'coordinating conjunction quiz'. The presence of numerous links, many pointing to SEO-optimized PDF files, suggests a link farm or phishing campaign designed to drive traffic to malicious sites. 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.cc/pify?keyword=coordinating+conjunction+quiz+pdf In PDF document text
    • http://files.horshamtreesurgeons.co.uk/uploads/1/3/1/1/131163890/165eeadab28c.pdfIn PDF document text
    • http://files.nightheronfarm.com/uploads/1/3/2/6/132695200/e6dd614c03e115.pdfIn PDF document text
    • http://files.blackbunnyboutique.com/uploads/1/3/1/6/131606480/xuzovasozosi.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/1/0432/7384/6952/files/soxurutoxagejosoroxufix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/79700915285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/1907397820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/lubemaner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/88531733072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/39014204866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/86560202196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/58229823666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/nazelusibuvebadi.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
🗂 Part of campaign: horshamtreesurgeons.co.uk 3 samples

Related samples 5

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_off00005bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFF 5152 bytes
SHA-256: 1fe93c3ff45e1725a1b42b27f6c8a36f0527296e81006aadf5fa2719144ef419
font_01_sfnt_off00006d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9A 9956 bytes
SHA-256: 37bc7338f12747fc096c4b86302f2e5dafe8cc954ef7e10a3e1f9fdf58d15586

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