Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddd693436bdb399…

MALICIOUS

PDF

36.9 KB Created: 2020-08-22 07:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e627f3ba9e9fc9cbe1d3216234ad6c1 SHA-1: ceb619054a3be52e01d07694e4532af54c4c5925 SHA-256: dddd693436bdb39981edc39a256b68dd6ed2e9ab1b8b3d57520afda1f76e6dc6
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/pify. The document body, though heavily obfuscated, contains text related to 'Sika armatec 110 epocem product data sheet' and the malicious URL, indicating a lure to disguise the malicious intent. 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.cc/pify?keyword=sika+armatec+110+epocem+product+data+sheet
    • http://files.maxhell.org/uploads/1/3/0/9/130969332/nokakimox.pdf
    • http://rebikasez.baieslings.com/uploads/1/3/2/3/132302842/a6a58cc.pdf
    • http://tusaz.kadkahwinlovely.com/uploads/1/3/0/8/130814328/gujutidax-junuzoxogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/elementos_de_la_administracion_publica_en_guatemala.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/38665289928.pdf
    • https://cdn.shopify.com/s/files/1/0436/4448/5790/files/bncc_ciencias_da_natureza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96512150342.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/28614138377.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/80783105237.pdf
    • https://cdn.shopify.com/s/files/1/0440/3914/3574/files/10424226124.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/61294196402.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/joxufodalipopunexuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/99363505072.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/arteria_iliaca_externa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/40884643591.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/cryptocurrency_mining_for_dummies.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_off000050d1.bin
6bd26060a2155836453f8e513234e5bbdd7c398edd474d889afa8534a10f23c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D1 5640 bytes
font_01_sfnt_off000063cf.bin
ed7ee80c916d23e155a3189e7fce12761f13e98acff24c0367068b94287fb5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CF 10216 bytes

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