Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c3fcae67cb8262…

MALICIOUS

PDF

42.2 KB Created: 2020-08-09 03:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a37cb5a6b55f9ab84855e7f58129af8a SHA-1: a8f8cc7e6f5a50ab9d7003f1a63cb1a9ee902f0f SHA-256: a3c3fcae67cb8262c95d20b6bf19f99900d4f3a63ddf29b171aefcae32932bae
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Adjectives em ingles pdf' and the malicious URL, suggesting a lure to download further malicious content. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=adjectives+em+ingles+pdf
    • http://files.ourhiddenhills.ca/uploads/1/3/0/8/130874104/wilazig.pdf
    • http://files.littlebitsofhawaii.com/uploads/1/3/0/8/130874583/lilenuwexibalow-titobajige-bitolomomifa-mopegogitarilus.pdf
    • http://xusud.troliosprint.net/uploads/1/3/1/6/131607163/6842335.pdf
    • http://files.kellyproudfoot.com/uploads/1/3/1/4/131453861/vobakawov.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/18253907635.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/sovewujusakujuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/razusifulemujuneg.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/95438644875.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/python_functional_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/96300685398.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/dawigaximunej.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/vajijonofilitizemago.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/binoluso.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/85447991163.pdf
    • https://cdn.shopify.com/s/files/1/0438/9722/5368/files/97745580163.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_off00005d9e.bin
98f6d7281d41bda30b100065030fdd9b21d8475761484526283823ae3d9984cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 5296 bytes
font_01_sfnt_off00006faa.bin
76e49887646cfa721719cf15a426b311a07e8cd65cc72b85ce5beb0057168655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 14232 bytes

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