Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d3ea4d095d3d8b…

MALICIOUS

PDF

45.6 KB Created: 2020-08-20 10:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bed4965e602b255debf6028b4843dedd SHA-1: 9b276afdeff2668981ee6f679e27773401361a42 SHA-256: 49d3ea4d095d3d8b17e310684100e46bc18f9dd94d3cff71b3716380fc08979e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is embedded within the document body, suggesting a lure to external malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains. The primary malicious URL is 'https://ttraff.ru/pify?keyword=literature+reader+class+10+question+answer', which likely serves as a gateway to further malicious sites.

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=literature+reader+class+10+question+answer
    • http://lugum.marcusjosephsax.com/uploads/1/3/0/7/130739344/lepipamipa.pdf
    • http://sikujos.agefriendlysarnia.com/uploads/1/3/2/6/132696056/lerur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3455/files/96929556725.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/monsters_by_cr_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/demim.pdf
    • https://cdn.shopify.com/s/files/1/0433/5566/8639/files/define_epileptiform_activity.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/belt_conveyors_for_bulk_materials.pdf
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/sujud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/mirak.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0093/files/bluestack_untuk_laptop_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/dofudabepepibikejunizu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/indented_key_and_bracketed_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9000/files/30930070966.pdf
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/blueberry_pie_nutrition_information.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_off000074ac.bin
ffb1fd5b32020f55f64eee337a7c0807c3842fd9cb5afba07f0d138697100c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AC 5288 bytes
font_01_sfnt_off000086c7.bin
5361552898c2d17cd91b87c16c7a10a766ab2390dfca406dc8488ed7307c2912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86C7 10236 bytes

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