Malicious PDF — malware analysis report

Static analysis result for SHA-256 472e2c711e1e23d5…

MALICIOUS

PDF

99.4 KB Created: 2020-08-01 18:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ebabce6c103c44bac7347e6a4765ed SHA-1: e8b2dd0766c3dc5d9e2ab70729adaf256a24190e SHA-256: 472e2c711e1e23d5e6bd846f821a442a5c8a7f5f7e63b888cd837211b4f17f05
120 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 pointing to 'https://ttraff.ru/pify?keyword=julian+date+calendar'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0432/2341/6987/files/5768127571.pdf'. The document body, though heavily obfuscated, contains references to 'Julian date calendar' and 'wkhtmltopdf', suggesting a lure related to date calculations or document generation, which is then used to mask the malicious redirect.

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.ru/pify?keyword=julian+date+calendar
    • http://files.knoxtrailforge.com/uploads/1/3/1/1/131164383/lekenapu.pdf
    • http://files.photosbywildwood.com/uploads/1/3/1/3/131398224/d1638605c7c.pdf
    • http://files.stephaniemarceau.com/uploads/1/3/2/3/132302987/82cadb34d8a.pdf
    • http://files.clothdiaperproject.com/uploads/1/3/0/8/130874162/27dc0.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/5768127571.pdf
    • https://cdn.shopify.com/s/files/1/0436/7246/9669/files/726637695.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/40996213297.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/zivorofuwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4429/1228/files/16122409113.pdf
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/73552856322.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/56106193567.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/99290994061.pdf
    • https://cdn.shopify.com/s/files/1/0439/3759/5560/files/faziseluwiribobeloruzud.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/fill_drupal.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/41852548363.pdf
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/kaximoxowuzoz.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_off00014031.bin
33cd20ddebc7ff1cc7bf0788ec4f9fb385f387ff685893719dd874727faac4f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14031 4744 bytes
font_01_sfnt_off00015062.bin
285e24be1d2d6b2ac67f633441a637a744965f24a78ecf2835d079ac3984a060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15062 15424 bytes

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