Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9306d943e62856…

MALICIOUS

PDF

53.8 KB Created: 2020-08-07 08:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 704c85124e47176ba46476e9b8d36bc6 SHA-1: dc35d65e08dd727513a06cf92e6d8eb10c353efa SHA-256: 0c9306d943e62856c62e83d3e68f49a74640f131c8d01739a6f94433cec794fb
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure like 'ttraff.com', suggesting a phishing or malware distribution campaign. The ML classifier and critical heuristics confirm the malicious nature of the PDF, specifically noting its use as a redirector and link farm. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to drive traffic to malicious sites, likely disguised as academic or download content.

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.com/wb?keyword=free%20radical%20addition%20reaction%20of%20conjugated%20dienes%20pdf In PDF document text
    • http://files.windhamchambersingers.com/uploads/1/3/0/7/130775027/8f035b6.pdfIn PDF document text
    • http://jidag.sealylionsclub.com/uploads/1/3/0/7/130776449/813221.pdfIn PDF document text
    • http://gowevesuk.envchemgroup.com/uploads/1/3/1/6/131606349/1247702.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/1/0435/4945/8591/files/betezevikeregowogemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/xobevixotafawazixawerepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/92040555631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/bonfiglioli_as_series_gearbox_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/28171167290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/gakiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6329/5650/files/auto_tune_efx_crack_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9886/4804/files/bafuxoxagodivawexiser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/53368330605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5285/files/vamakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/vetunemesibiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/98791215664.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: windhamchambersingers.com 4 samples

Related samples 2

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_off000089ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89ED 5356 bytes
SHA-256: 7405713f975c6a9e26aec8ab9ae064284b417907ed6985b32129ce5499dd02a8
font_01_sfnt_off00009c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3D 14748 bytes
SHA-256: 337d6fd0c988307adc0350d36764e93f7272675086d3526ae2329f4554b792b1

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