Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8db7c0d2fbfbe00…

MALICIOUS

PDF

47.0 KB Created: 2020-08-21 14:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0fe98bd75b5c5aeef867e00cbb9d806 SHA-1: fa2cdde99c106017034030b60c161f947f34565a SHA-256: d8db7c0d2fbfbe00d78f1ac8c886b836250ededc5818b27182d98ee3def80c0d
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body contains obfuscated text and the URL 'https://ttraff.cc/pify?keyword=archangel%2527+s+heart+pdf+espa%25C3%25B1ol' is present, which is likely intended to lure the user to a malicious site. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=archangel%2527+s+heart+pdf+espa%25C3%25B1ol
    • http://files.fermatatruffles.com/uploads/1/3/1/3/131383791/guvewatukidusaj.pdf
    • http://files.graldersgate.org/uploads/1/3/1/4/131453453/muwabokejumogorukul.pdf
    • http://files.terrievoigt.com/uploads/1/3/0/8/130814475/7d5f96639128e.pdf
    • https://cdn.shopify.com/s/files/1/0428/7486/3772/files/13779634124.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/mecanismo_de_accion_de_anticonvulsivantes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7914/files/93461784592.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/23255083926.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/cogitamus_bruno_latour.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/tirogeduxeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/3133/6859/files/31286145518.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5263/files/manual_ortopedia_pediatrica.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/sifurufolesaxifarok.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/63913468388.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000765d.bin
f25c26ca125b9fa220da77a3ca0b37678cc5f0ef798e0e761a0d646bd488df8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 5652 bytes
font_01_sfnt_off0000894d.bin
bc9746bc546efa99ee4378a8e692a2dd9391b2fd59b8f8d08196c19767c9dedf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x894D 10588 bytes

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