Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef2fcd876f1f6f6…

MALICIOUS

PDF

48.3 KB Created: 2020-08-28 13:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d2d39b1dfc7f0783bba7f4a11bacb39 SHA-1: f762ffefc0f42ba9553341ca7a1c5ad9405a1e42 SHA-256: eef2fcd876f1f6f65679292fc056d8bced3c88b6cb44f70b2a0afaf1d4b47d87
120 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, specifically pointing to 'https://ttraff.ru/pify?keyword=nbr+7211+pdf'. This indicates the document's primary purpose is to redirect users to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign Shopify domains, likely as a camouflage or to inflate SEO. 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=nbr+7211+pdf
    • http://files.cbcky.net/uploads/1/3/1/3/131384573/rezen.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/missing_word_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8487/files/california_notary_acknowledgement_form_word.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/find_surface_area_of_triangular_prism_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/guitar_rig_5_player.pdf
    • https://cdn.shopify.com/s/files/1/0439/3651/4216/files/21231714667.pdf
    • https://cdn.shopify.com/s/files/1/0439/5129/2584/files/88522477362.pdf
    • https://cdn.shopify.com/s/files/1/0451/1842/3194/files/administrao_financeira_lawrence_gitman.pdf
    • https://cdn.shopify.com/s/files/1/0435/9444/9055/files/clarke_quay_singapore_restaurant_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7207/files/15086983073.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_off00007147.bin
79f5a8ef187fb5e7541f6dfdc5cfe290fbb7ccde05ce15b4f68a6958ffe92bb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7147 4312 bytes
font_01_sfnt_off00007ff2.bin
94eb06e3698ecf29f5b43741ae8161c2e999f2f223c96bca7f5edf593e8e7888		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 12004 bytes
font_02_sfnt_off0000a713.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA713 4324 bytes

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