Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc71857b40f95a9c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-22 08:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ad9bf61d21c8ee00687c8b9ea792402 SHA-1: 769d1d627b5ff8de94a130e7ab3fa223f7d4c26d SHA-256: cc71857b40f95a9c8c4721a8253cfa9f27b0254e373dc1f8a00e879b965ec130
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for a template. The document body, though heavily obfuscated, contains this URL and other benign-looking URLs hosted on Shopify. The primary attack pattern appears to be a link farm designed to lure users to malicious infrastructure.

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=3d+hexaflexagon+template+pdf
    • http://pajowedo.crysis-cake-scene.com/uploads/1/3/1/4/131482952/8582340.pdf
    • http://xavozije.manuelamazzanti.com/uploads/1/3/1/0/131070493/b3a50d6a41ec9e5.pdf
    • http://files.jtspowerwashingpros.com/uploads/1/3/1/8/131856987/36e70f6.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/bupozoxav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9525543421.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5159/files/cakephp_2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/capitales_del_mundo_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/80606370877.pdf
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/vexiwonevadaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/motifefame.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/mudotip.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/pasoxuwizurenov.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/convertisseur_youtube_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0462/7936/0661/files/weather_network_allergy_report_ottawa.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_off00006772.bin
174850b52151d7664e11758a4f5332f28365980ebd2c04a88bd3d47ce4775f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6772 5316 bytes
font_01_sfnt_off0000796c.bin
b2c0c192f9c453a29ccb5b50772365d7d946441ffec85cb08ab557ec1eb52351		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796C 10028 bytes

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