Malicious PDF — malware analysis report

Static analysis result for SHA-256 1966434bf8fcbe50…

MALICIOUS

PDF

47.8 KB Created: 2020-07-31 14:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1b04f941971d457c6d9066de5e3f654 SHA-1: 7df782099017f0ec07ad0222ba7fbf31a69b2e6f SHA-256: 1966434bf8fcbe50565cc8f567532f5518425137b790009010021c981e4623a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic indicates a link to known malicious redirector infrastructure, specifically 'ttraff.com', which is likely used to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=sweet+love+quotes+for+her+pdf
    • http://files.chelmsfordosteopaths.com/uploads/1/3/1/4/131483662/lapipajaba.pdf
    • http://files.wildlandsar.com/uploads/1/3/0/7/130775784/ganelikutelu.pdf
    • http://files.kretzmerconsulting.com/uploads/1/3/0/9/130969708/9bfecc2.pdf
    • http://files.jannmorgancounsellingservices.com/uploads/1/3/0/8/130874457/3e3db360f.pdf
    • http://files.cshstheatre.com/uploads/1/3/1/0/131070560/bd157c5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/toraxelimomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/novozalesutapiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/63773845751.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/bigeginol.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/49416367393.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60561448525.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/calcio_antagonisti_farmacologia_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/90250878609.pdf
    • https://cdn.shopify.com/s/files/1/0435/0813/8150/files/mijizirifa.pdf
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/56602139334.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/3046686047.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/kutexubajakebizikenabuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/tizejokasiraxuzavunisef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e2f.bin
0b7f879435cff139ba79e8610b4cb52b5b1e95c7c5e89286c172efc85359d0c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2F 5028 bytes
font_01_sfnt_off00008f77.bin
4fca7e0d41ee08287ff7d1cbf7315e6a88143671c6f2eae2ec19b7026ca3b570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F77 10080 bytes

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