Malicious PDF — malware analysis report

Static analysis result for SHA-256 796aaf757abcb661…

MALICIOUS

PDF

44.2 KB Created: 2020-08-16 21:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa219a2c3ff57123e34e4a9d6da27359 SHA-1: e264d4e2fb96ac5d593c3f9f508c2a28111b53ad SHA-256: 796aaf757abcb661f5721f0ef05041da0fd2e9d4fa80b36ee857c2f8c9ff52b8
150 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, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to the 'Bangladesh cricket team' and a URL that appears to be part of a link farm designed for SEO manipulation. The presence of multiple embedded links, including the malicious redirector, suggests an attempt to drive traffic to malicious infrastructure, likely for phishing or malware distribution.

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/pify?keyword=bangladesh+cricket+team
    • http://files.guerasboutique.com/uploads/1/3/1/6/131636972/vuroluzelax.pdf
    • http://files.artisanmadegemstones.com/uploads/1/3/1/8/131857540/9dc1300.pdf
    • http://files.tantrapsychic.com/uploads/1/3/1/0/131070178/tosovomorulifasuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/8997/files/82882305681.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/young_again_in_another_world_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8526/files/dunuzoviduvubuloduzetujez.pdf
    • https://cdn.shopify.com/s/files/1/0430/1714/2433/files/74539060057.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8639/files/griffiths_electrodynamics_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/xumoxul.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3690/files/43317738564.pdf
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/creative_writing_assignments_for_middle_school.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062bc.bin
ac9918b3c900bfaa4f5ad1d9fbf44274b4c675f89e7f72338ecade1ec78e3c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 5144 bytes
font_01_sfnt_off00007400.bin
5bd61ba4069f9d2a28d185a7704a967577c379869ad203b51ce4f6e8c8246b01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7400 10088 bytes
font_02_sfnt_off0000966c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x966C 4324 bytes

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