Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c287c4624506a4a…

MALICIOUS

PDF

46.5 KB Created: 2020-09-19 22:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8011a7632e6ba92b20e81e9b7351da63 SHA-1: 9101cfc8607e9e6674952ff3680a0916bd91bf2b SHA-256: 9c287c4624506a4afd501e66d01196a13537f014a5431dd94610593d1dcb6c2b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to external PDF files, which is indicative of a link farm or a method to obscure malicious intent. The primary heuristic firing highlights a link to a known malicious redirector, 'https://ttraff.link/wix?keyword=geometria+analitica+formulas', suggesting the document's purpose is to redirect users to malicious content. The document body, though heavily obfuscated, contains this same URL and references to 'wkhtmltopdf', indicating it was likely generated programmatically to host these links.

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.link/wix?keyword=geometria+analitica+formulas In PDF document text
    • http://jediv.rewoca.org/uploads/1/3/1/4/131407089/6824385.pdfIn PDF document text
    • http://wemupon.iustuff.net/uploads/1/3/0/9/130969761/1355626.pdfIn PDF document text
    • http://sibof.northposeybasketball.com/uploads/1/3/1/3/131384721/mudajagazazoxape.pdfIn PDF document text
    • http://files.invigorationnovelties.com/uploads/1/3/1/4/131455475/senafanawuse-dejiropol-fezetabalebimuv-metuz.pdfIn PDF document text
    • http://xetufav.marleneinteriors.com/uploads/1/3/1/6/131606346/596191.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/1/0438/4771/2928/files/likomugujizuvomer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/8132439738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48466687054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0403/3181/files/lofewetegifexi.pdfIn PDF document text
    • https://81d43b2d-5142-4730-aa83-00d8a29eeb39.filesusr.com/ugd/417718_14f7668d893840e5bb0b1754e3be8e46.pdf?index=trueIn PDF document text
    • https://0ca05a9a-26c8-4a07-8b69-f857eee4a62e.filesusr.com/ugd/62e2c1_a90279efe4e044d5867a7bb4a3b00cdb.pdf?index=trueIn PDF document text
    • https://67e22141-a2e6-4e1d-941e-2d50546dd7e8.filesusr.com/ugd/2994dd_57a938184e554b1f8e659ddc9812d5b4.pdf?index=trueIn PDF document text
    • https://570172ec-1f21-4b60-b7d3-d8c146cb179c.filesusr.com/ugd/e3325f_6699dc0fd6694976bf46320ac8730946.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 5056 bytes
SHA-256: baa111461e9535d135fdcc2ef69d9254e403782877f9220b1049d75e2f1ab52b
font_01_sfnt_off0000745f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x745F 10068 bytes
SHA-256: 6b00f98bc17627d5ff42030f85b6d6151349852d7537f4b6f1746139358e11dc
font_02_sfnt_off00009703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9703 16384 bytes
SHA-256: fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040