Malicious PDF — malware analysis report

Static analysis result for SHA-256 239ef7477df5c47c…

MALICIOUS

PDF

47.0 KB Created: 2020-08-12 11:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c42fc940d45d70ab3653e9b492772ced SHA-1: 7cf53d687fe868c75d268ab239bcf8835b13cb9a SHA-256: 239ef7477df5c47c1dc36dee62e9ade20ba4d587325c32e14b2751e39fd4545d
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as legitimate documents. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.cc/wb?keyword=water%20cooled%20chiller%20operation%20pdf'. This suggests the document is part of a link farm or SEO poisoning campaign to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=water%20cooled%20chiller%20operation%20pdf In PDF document text
    • http://masif.bhillartistry.com/uploads/1/3/1/6/131636789/7298599.pdfIn PDF document text
    • http://files.dorabramden.com/uploads/1/3/1/3/131382141/3729828.pdfIn PDF document text
    • http://files.havanagracebaptistchurch.com/uploads/1/3/0/9/130969481/wigumoxiwinozoko.pdfIn PDF document text
    • http://foruteki.clbmg.com/uploads/1/3/1/4/131410812/wonalezasafo-juzilovazal-teregimapeg.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/1/0436/4576/3737/files/45256399670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/mivaveselajuninazonezax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/35273145961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/jekuxig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/99548121988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/vorijuwobalizekin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/archaeological_method_and_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/javascript_tutorialspoint_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/adipocyte_differentiation_and_gene_expression.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/9320724302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/argumentative_essay_outline_middle_school.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_off00007c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C03 5080 bytes
SHA-256: 1c1e2cc08feeac28be7337ade53cb71676d00f5aa625c8472f2178b760478a51
font_01_sfnt_off00008d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4A 9968 bytes
SHA-256: 4fdda4d8c2ffaa17a863afe06aab7e6b90e074a0e075e801de7cc9145889db75

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