Malicious PDF — malware analysis report

Static analysis result for SHA-256 c298e22a400aa569…

MALICIOUS

PDF

43.1 KB Created: 2020-08-07 21:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97ee34553f70233dd5ba3ef453c8a9a6 SHA-1: a1bcd277940b4dd1243d96457e5d8cb5a1933a72 SHA-256: c298e22a400aa569dc456b15d1e193ce7f89bd045f581022f62217d4c8c39c3e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=acuerdo+de+confidencialidad+nda+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify, suggesting an attempt to distribute malicious content or engage in SEO abuse. The ML classifier also 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=acuerdo+de+confidencialidad+nda+pdf
    • http://kexekula.fredericpissarrousa.com/uploads/1/3/1/8/131856161/7078693.pdf
    • http://files.clergysurvey.com/uploads/1/3/1/3/131379396/supujivugujoradiwure.pdf
    • http://files.higginsmarinemetals.com/uploads/1/3/1/4/131482976/4081814.pdf
    • http://files.bayareazetaplayers.org/uploads/1/3/1/4/131453610/boxaxipilamebu_dowizep_mevoluwerotagug_jimasotudepiseb.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/16011110761.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/lepozufazuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8966/4926/files/fidemexezitixiwivuwerew.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/xoxeke.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/legakegewanifatapo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/apraxia_ideomotora_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/vutivadavefepiralufom.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/91577550924.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/nenuzojowowiwulumuguxup.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/bupuxufukorexopinaga.pdf
    • https://cdn.shopify.com/s/files/1/0435/6784/1443/files/bapomarazifika.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/98839134666.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_off00006731.bin
ba2bbe3267c559c3fcc54b6257aba0e56240d178f6fe1b6fb17b65798652eb7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6731 4960 bytes
font_01_sfnt_off00007823.bin
619a43fa5cf38db167e404ed013d9724af03ffb797d7457a90bc7d4b2fb0dc21
pdf-font-stream PDF embedded font (sfnt) at offset 0x7823 11504 bytes