Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca97ec06f63962d8…

MALICIOUS

PDF

50.0 KB Created: 2020-07-30 05:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b55dca5dee261bfad09584ab99314450 SHA-1: 68348194954dd6c6d3b540d2dcf204e391529f44 SHA-256: ca97ec06f63962d8602a8b6b573e3037b6746106ff8911af9123ee74a53cc336
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or redirection scheme. The primary malicious URL identified is ttraff.cc, which is known for redirecting to harmful content. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

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/pify?keyword=machine+learning+pdf In PDF document text
    • http://files.chuysmex.com/uploads/1/3/1/6/131606640/5888260.pdfIn PDF document text
    • http://files.ventproducts.com/uploads/1/3/1/6/131606065/komorofemo.pdfIn PDF document text
    • http://files.kristenjoanphotography.com/uploads/1/3/1/6/131606923/webowarirokome-dezimanibanem-gexebijotamuk-biseviku.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/1/0428/9835/8432/files/baxumedufimoval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/sonaxibotefilidonuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/34491729393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/98355180905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bipifapokuwegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/vopusag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/topulemalameduvafenef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/linax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/ponenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/bonatiridudoduvedipori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/dexos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/rikododovefipikalubovor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/84378071305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2900/2390/files/92658493864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/zuwasiv.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_off0000871c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871C 4840 bytes
SHA-256: f763964905c6802a3efb18d8f59638191f515fd916c1bf3272a50971a5bd5338
font_01_sfnt_off0000977b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977B 10376 bytes
SHA-256: fd413c630fd936ae5c7263c13d3f3b3823eb1f6509e318d165e273cc6c362488

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