Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef3d459b3b1f346…

MALICIOUS

PDF

119.8 KB Created: 2020-08-16 14:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8886a0943b528ffb9561bf8b18aa6c38 SHA-1: 80cb8ab5a7f76d592a319a040385a906f099e851 SHA-256: fef3d459b3b1f3464533d9fd5ad4003a89379ad3d7a6470fe9e4c639a1ff48c3
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=try%20n3%20pdf%20free%20download'. This URL is likely part of a phishing or scam campaign designed to trick users into downloading further malware or visiting malicious sites. The document body also contains this URL, reinforcing the lure. The presence of a PDF link farm heuristic further suggests this document is part of a larger SEO-based malicious distribution effort.

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=try%20n3%20pdf%20free%20download In PDF document text
    • http://files.wellsbranchchurchofchrist.org/uploads/1/3/1/8/131857305/1533815.pdfIn PDF document text
    • http://lizevem.drscapp.ca/uploads/1/3/0/7/130776031/jedefuxa.pdfIn PDF document text
    • http://files.deadmeatband.com/uploads/1/3/0/8/130814676/welapuguz.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/1/0433/9286/0327/files/epilepsy_and_behavior_case_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1633/1172/files/91873824560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0171/4587/files/responsive_website_templates_in_bootstrap_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/80672336273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/mofogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/37378741151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/30258650449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/10422774516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/warhammer_apocrypha_now.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/tixijuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/19998562017.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D54 103652 bytes
SHA-256: db84e14f25490cd5c98735457178d8aa6c277ee33ecbf1cc679c64377fa2a04f
font_01_sfnt_off000192fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192FB 5164 bytes
SHA-256: 639ae4ca1ed20fa5e30e19b14938c5494199bed929d395732bdc0026d5499cde
font_02_sfnt_off0001a4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4B0 14208 bytes
SHA-256: 177d43fbd98d5547800ecebe5da9718865d33580a8f0717e2646fe237468d8a3

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