Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb8e6d1f5807d0e…

MALICIOUS

PDF

33.9 KB Created: 2020-08-11 19:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee4fe901a3562c53af21951e25f3f03 SHA-1: ec258a4382be899663b2c99d5481a4dc7a1fd55d SHA-256: deb8e6d1f5807d0e082f263febfce8a663e6817021e8fe5eb46be5a2101bd1ba
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same URL found in the redirector heuristic. This suggests the primary intent is to drive traffic to malicious infrastructure.

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.ru/wb?keyword=language%20gender%20and%20sexuality%20kiesling%20pdf
    • http://files.spiritusnw.org/uploads/1/3/1/3/131380297/39f4edb7bba.pdf
    • http://files.siliconeallie.com/uploads/1/3/0/8/130873932/1163512.pdf
    • http://files.kelsianderson.com/uploads/1/3/2/7/132710601/zedufezaf_busavapuxonem_sirupox_nakipunurezirir.pdf
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/playboy_magazines_collectors.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/52543904944.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/64285596712.pdf
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/82289083532.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/35555777129.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/savuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/classic_wow_cooking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/5406/9925/files/socrates_books_in_punjabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/russian_vocabulary_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/74210200465.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/in_him_alone_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/72343461481.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_off0000462b.bin
77723842c43c7437202979faa656bde4da8f0e504f818bc47ea51ec1652ae63e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x462B 5384 bytes
font_01_sfnt_off00005898.bin
aaede0630c6e0d3ebc220fb7909badec9e188a04f368b7e846c6552c1744529d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5898 9972 bytes

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