Malicious PDF — malware analysis report

Static analysis result for SHA-256 474ab9ca84788374…

MALICIOUS

PDF

46.2 KB Created: 2020-08-06 05:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0c1e55abf5f40a90df33eddc1c297d0 SHA-1: da7972a00d337308de3e8c8035780cff9379f547 SHA-256: 474ab9ca847883741034a816b3f6649b129ac290e55613a8691a935b6e448a09
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.com'. The document body, though heavily obfuscated, contains the same URL and other Shopify links, suggesting a lure for free downloads. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be a malicious redirector disguised as a document download.

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.com/pify?keyword=calligraphy+lessons+pdf+free+download
    • http://files.riverosphotography.com/uploads/1/3/1/6/131637021/ef22c4a49.pdf
    • http://files.mizpah36.org/uploads/1/3/1/3/131379045/6624586.pdf
    • http://faminan.whitewillowcollective.com/uploads/1/3/1/3/131379732/3095746.pdf
    • http://files.tammykjohnson.com/uploads/1/3/0/8/130814057/5523693.pdf
    • http://files.magrathconsulting.com/uploads/1/3/1/3/131380158/nefoner_xakozumewod_tizomabagibafe_fopemu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/author_s_craft_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/facebook_cash_machine_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/rudipemenatogeditit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/rapprochement_bancaire_excel.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/introduction_to_analysis_wade_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/togamobavugizirefaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/laxesurefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/ziruled.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/miridekasarimasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/23008642289.pdf
    • https://cdn.shopify.com/s/files/1/0432/8554/5124/files/vadafepozanobuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5172/6501/files/98100493462.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005969.bin
5c504850acd051206bbab81625a7ee62f8b49c9bac00243343f4f0b013e36bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5969 5404 bytes
font_01_sfnt_off00006bd0.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD0 1800 bytes
font_02_sfnt_off0000745c.bin
033e850435bc9d91d3bbb0a87fa7fe0989612c567a47bb5b87daf15e90716227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x745C 9748 bytes
font_03_sfnt_off000095fc.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95FC 16092 bytes

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