Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb6ff6ecd8bb86c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-04 23:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 648eabef6e007f76c8f8370ff6deb5b3 SHA-1: a6fb0774b608676ef75010360d64a9f4ab3284d3 SHA-256: 1fb6ff6ecd8bb86c29222b808181d4327ad1bcef08c7514dece9ca0c2f35f01c
120 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, specifically pointing to 'https://ttraff.ru/pify?keyword=discussion+method+of+teaching+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, also contains the aforementioned malicious URL and several benign-looking Shopify URLs, suggesting a lure to a malicious site.

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=discussion+method+of+teaching+pdf
    • http://files.cypresscoveconservancy.com/uploads/1/3/0/7/130776542/e5809b993664.pdf
    • http://files.kd-photography.com/uploads/1/3/0/8/130813134/miviv_zidup_makanup.pdf
    • http://files.kspaceonline.com/uploads/1/3/1/3/131380868/b7e90.pdf
    • http://files.goodshepherdogden.org/uploads/1/3/1/1/131164386/ff25b830930c1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6892/3799/files/pevitag.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/gasuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/maths_construction_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/488979600.pdf
    • https://cdn.shopify.com/s/files/1/0434/2484/1890/files/jisupop.pdf
    • https://cdn.shopify.com/s/files/1/0446/9882/8954/files/journey_of_the_flower.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/43933170045.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/58335085815.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/wadapavodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/nikalogavizakup.pdf
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/chemistry_for_engineering_students.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_off0000696c.bin
f61919f3d28755a679dd44698470946eb4dd7e72863a50f0ebd22197e8d44035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696C 5440 bytes
font_01_sfnt_off00007bd3.bin
f4aa6cd694f3ba1506c4e887bb70bd0a7008193fe08e1cf4b484d174b868320b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD3 9776 bytes

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