Malicious PDF — malware analysis report

Static analysis result for SHA-256 212f911e2d8742d3…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 03:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a5d2578a0d10209816deb583473b1f7 SHA-1: a506bd14467f758456c377f6f5bf6ae66cab0fc3 SHA-256: 212f911e2d8742d3983998937bdb0d8b1e1f9184a93eba04f1fdba03920404fe
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and mentions 'benefits of a rooted android phone', suggesting a lure. The PDF also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO link farm abuse.

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=benefits+of+a+rooted+android+phone
    • http://nufuw.baharwomen.org/uploads/1/3/2/7/132712062/df5f6a8e8.pdf
    • http://files.whattodoincatalonia.com/uploads/1/3/2/8/132814375/eddeea97.pdf
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/18277391893.pdf
    • https://cdn.shopify.com/s/files/1/0434/8667/5108/files/anexos_embrionarios_e_suas_funoes.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/ventilator_associated_pneumonia_prevention.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/52878686625.pdf
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/togifaberusidux.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/pisulemavu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/mathematics_puzzle_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/sibuxagipujisimunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/sawibusegetosomizeja.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/general_chemistry_formula_sheet.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_off00007145.bin
aaedaf1069ff048493355a0fcfd7c3bfb8964097fd7d83130940c6b383b7e9b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 5144 bytes
font_01_sfnt_off000082bd.bin
d4f16b69b362bd8a626196c3be8a0f30fb4d705695fe9118e7e34718fd051d2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BD 9780 bytes

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