Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9d12771fc3a291…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 00:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a66b4f0bbab31ed53fadc088467fcbe9 SHA-1: 0e617aae3a713b58d6685bd28db854ef4f21fca9 SHA-256: 7c9d12771fc3a2912686660538c39157b2043ae2456f8c1f5866453664464d78
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary redirector URL, 'https://ttraff.com/pify?keyword=bronchiolite+du+nourrisson+pdf', is likely used to funnel victims to phishing pages or malware downloads. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=bronchiolite+du+nourrisson+pdf In PDF document text
    • http://files.psychometricdynamics.com/uploads/1/3/1/3/131382032/4e6f419d31e.pdfIn PDF document text
    • http://files.matthewlamburngames.com/uploads/1/3/1/3/131381422/1e5e88b.pdfIn PDF document text
    • http://files.thresholdsorganizingco.com/uploads/1/3/1/4/131437981/zupavujani.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/1/0433/0687/7080/files/zututekafufefosapebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/tozusiguwawenimelud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/zuzixubazotonafinokowup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/corporation_bank_account_closure_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5987/9834/files/epidemiologia_clinica_ruiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/24894264368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/sujotaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/lazaxegokanuforebibajaj.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 7

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_off00006566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 5084 bytes
SHA-256: c70f06264c02f56b7402492729769da942b3821eb44aa3f7d5f9498e529f176b
font_01_sfnt_off000076a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A2 11460 bytes
SHA-256: 0fec594ad399f76a917ed8fc066c5e257f8f1f87bcc63e0d08adb0e9eb153683

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