Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e38502a2845edc…

MALICIOUS

PDF

98.4 KB Created: 2020-08-13 21:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bfaf2a41a05fe853e108c56a984cca0 SHA-1: 832fadadf0beec0ea236ee0cc264d1a997fc42ca SHA-256: 93e38502a2845edcb3aea00f564b5d803137667141ad85a87be3f30019d89b69
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=osteomyelitis+guidelines+idsa'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, with 'https://cdn.shopify.com/s/files/1/0432/7315/8821/files/zoveremujezaruvama.pdf' being one of the first identified. The document body, though heavily obfuscated, contains the redirector URL, suggesting the primary intent is to redirect users to malicious content. No scripts were extracted from this sample.

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=osteomyelitis+guidelines+idsa
    • http://vedoman.colescountyanimalshelter.org/uploads/1/3/0/8/130814229/gipedusa.pdf
    • http://files.counseling2transform.com/uploads/1/3/1/4/131453251/e4a2612b6442f.pdf
    • http://files.homeralan.com/uploads/1/3/0/7/130739809/dasafeneguje-tesateve-fuwujifa-zemaviripinipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/zoveremujezaruvama.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/hypoglossal_nerve_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/55964979514.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/normal_cdf_versus.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/newozekuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/83576998409.pdf
    • https://cdn.shopify.com/s/files/1/0434/0413/2508/files/gikegifemanixafuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/jepudurekomukamakizidiluw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1474/files/cahier_de_vacances_cp_vers_ce1.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/38107975124.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_off00014402.bin
4b27740dc7338c09e3ed4131016bedf747c9add90ba9739c5ff935f7aa8c624d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14402 5176 bytes
font_01_sfnt_off00015594.bin
71fc0890707af01801c94d1fdc50341637166077c599dffb878f734976e42182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15594 11372 bytes

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