Malicious PDF — malware analysis report

Static analysis result for SHA-256 db14c1bcb7eb8c1e…

MALICIOUS

PDF

63.4 KB Created: 2020-08-07 02:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bf1f234a377380ff3059e6319384e8f SHA-1: 98a3992660cfc02a6bc64e5a2285b9e39d0bed5f SHA-256: db14c1bcb7eb8c1eb30c5dca1fbd5345f534bd97a08f6c6d2756dd915aff4edb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains embedded links that point to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, suggesting an attempt to distribute malicious content through numerous seemingly benign links. The primary attack vector appears to be social engineering, tricking the user into clicking the malicious link under the guise of accessing a journal PDF.

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=free+radicals+and+antioxidants+journal+pdf
    • http://files.ashleyalverthdesign.com/uploads/1/3/1/6/131636625/9245048.pdf
    • http://files.thecountrywrensnest.com/uploads/1/3/1/4/131407088/4080863.pdf
    • http://zagubomir.lesliepetersonsapp.com/uploads/1/3/1/4/131452883/gisuvelufiwuviwuxav.pdf
    • http://files.demigodlodge.org/uploads/1/3/1/3/131380107/2311125.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/82028257926.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/nojaxavopowamojepomabup.pdf
    • https://cdn.shopify.com/s/files/1/0432/2272/8866/files/legojebuziboketenimo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4926/8886/files/93588887040.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/74319373507.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/javejafivepo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/68774673069.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/les_fleurs_du_mal_charles_baudelaire_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6181/3152/files/hashflare_reinvest_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0439/2737/1931/files/kuwijovuxosaperojuvif.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/titoxamob.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_off0000baab.bin
382e7f97cc00ecf9dcab868a9e97e86ca2aa4bb96d89c92b5491e5b137cdbfc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAB 5248 bytes
font_01_sfnt_off0000cca1.bin
b46cdf4e7a874ce133e34d883743220e91395d1a2aaf5ca567bbadd7d0b0264c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA1 10412 bytes

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