Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaaf98d811d476a7…

MALICIOUS

PDF

53.1 KB Created: 2020-08-08 05:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99c18cfdf3ee4a4272458d015ee857fc SHA-1: 80b44e3a5c337359f446d6391966137a59d53b22 SHA-256: aaaf98d811d476a78fd4ec1c06cf836e152eae15ba694515937d10fabe8345bc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged for containing a large number of external links, many of which appear to be generated for SEO purposes. One embedded URL, 'https://ttraff.com/wb?keyword=biografia%20de%20miguel%20cervantes%20saavedra%20pdf', is known to redirect to malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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/wb?keyword=biografia%20de%20miguel%20cervantes%20saavedra%20pdf In PDF document text
    • http://files.francofestcalgary.com/uploads/1/3/1/4/131437765/xonuze_miwemoje.pdfIn PDF document text
    • http://files.rebeccakallies.com/uploads/1/3/1/3/131378990/dujowejumafukurim.pdfIn PDF document text
    • http://files.skinsalvy.com/uploads/1/3/1/4/131483098/nugipisiditaloz.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/1/0435/7075/7791/files/auma_actuators_wiring_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/vilolisaroboleku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/gigawokunafaxefobiguwulix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/jailbreaking_ios_7._1._2_iphone_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jobevemavesofidubuxiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/pozotepanab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/96620085343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/58220431753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/tuxanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/59938776986.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_off00008e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 5584 bytes
SHA-256: 3c4b9a0f6ede6caa00e95176ebbd5f9fab55936bdfae5a7ddff968f4167407a2
font_01_sfnt_off0000a160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA160 10976 bytes
SHA-256: ded006dcef10e968255d133a093279f91e8c06f10c1ac963840a5c546ca31983

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