Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4df171892ac182…

MALICIOUS

PDF

39.9 KB Created: 2020-08-06 09:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d655a6cf909c1025eddc6c531b876e6a SHA-1: 179d59a0110391aa54f455153cedc87d1fefe0f7 SHA-256: fb4df171892ac182142b50c9e4824e6508a2315034b1ef8ae71b7e92ff3bba69
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body text appears to be a mix of metadata and garbled content, but the presence of numerous external links suggests a link farm or phishing attempt. The primary malicious URL identified is https://ttraff.cc/wb?keyword=calmodulina%20funcion%20pdf.

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=calmodulina%20funcion%20pdf In PDF document text
    • http://files.westfielddentalpa.com/uploads/1/3/1/3/131383424/960f6c4b7484.pdfIn PDF document text
    • http://saxew.westgarthpharmacy.com.au/uploads/1/3/1/4/131408027/japif-vanafijoru-gunewifisavosiv-zuberawoxedag.pdfIn PDF document text
    • http://files.bigrsldp-ph.org/uploads/1/3/1/8/131871466/73a8286a1c.pdfIn PDF document text
    • http://files.mtgcgs.org/uploads/1/3/1/8/131856706/111101d4.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/1/0437/0094/5048/files/86662246700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/32501740129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4244/6229/files/kesejakubapopamixapafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/wimegadomaxeposijiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/betudikezabur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2197/1104/files/declaracion_de_busqueda_activa_de_empleo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/83089436527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9942/1856/files/bewazuxemixelaranawafiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/dopepezuxefikelezav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9128/7452/files/xedukavoxadixemuxilal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D42 4932 bytes
SHA-256: 0ffe665b2e94c6e7e9f1478cbc92a6338895fb87b89e42737e640b13ae941ffc
font_01_sfnt_off00006e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 10784 bytes
SHA-256: b7f89229c48a5d657da3e414a87a1c6922b6cff2a1222ff62fddcf3cec39502d

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