Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0b070743d7c3e3…

MALICIOUS

PDF

39.8 KB Created: 2020-08-23 19:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4204f86bb962ec65a4bb65e8a640b30f SHA-1: fd31fedf911834fefb2166baf9853b897ac6f4ac SHA-256: ac0b070743d7c3e3f5dfac3753a630d76d272e93ddddbb00e6072787a618ff47
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=graphing+rational+functions+transformations'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though heavily obfuscated, contains the same malicious URL and several benign-looking PDF links, suggesting a lure to disguise the malicious intent. 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.ru/pify?keyword=graphing+rational+functions+transformations
    • http://dapoji.gradychristie.net/uploads/1/3/1/4/131453902/f1ab80fc2.pdf
    • http://files.theesabrinalopez.com/uploads/1/3/0/9/130969054/dabuvagezepizuwiw.pdf
    • http://sukitup.bespokecarpentry.org/uploads/1/3/1/6/131606490/7827143.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/noxuposizepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/buffer_analysis_in_gis.pdf
    • https://cdn.shopify.com/s/files/1/0439/3825/0910/files/powerpoint_game_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/rowumumiwizam.pdf
    • https://cdn.shopify.com/s/files/1/0448/2659/1389/files/wobupidufoxorila.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0528/files/sujudajiwipikaji.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/99013714951.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/unity_check_if_gameobject_is_active.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/vanisadafewuja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/55776858199.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_off00005e4d.bin
4f9e045e63804f0db418f91362db23d5e3abe06c1829d007301974868a0e1472		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4D 5460 bytes
font_01_sfnt_off000070ba.bin
7cd7f6a5086089c746c45acfc2606221a2b35914ba2919b54960beed119bbb65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BA 9840 bytes

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