Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc816254a48f52e…

MALICIOUS

PDF

51.4 KB Created: 2020-08-11 03:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01057486b1d721b2191dd77f8ee2af4 SHA-1: bfbd4e3b16ce6953e988e7f92736542ccaf3085c SHA-256: dbc816254a48f52e84b3303d690e57695e3f625a62e5fbeb73ef3ec0aa56bbde
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to what appears to be a link farm designed to lure users. One of the primary links, 'https://ttraff.cc/pify?keyword=canciones+para+guitarra+en+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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=canciones+para+guitarra+en+pdf
    • http://zufekovil.thelashladyutah.com/uploads/1/3/0/9/130969744/tikabafubo.pdf
    • http://files.nickhupton.com/uploads/1/3/1/3/131383838/dozujaxevasiv.pdf
    • http://files.lifesultimatequestions.com/uploads/1/3/1/6/131636689/9692814.pdf
    • http://files.centrecollegialalberta.com/uploads/1/3/1/3/131380177/6114809.pdf
    • http://files.humphreyhummingbird.com/uploads/1/3/0/9/130969798/4dfe401fa3f.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6471/files/jipaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumuwajufutoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/65211964836.pdf
    • https://cdn.shopify.com/s/files/1/0429/0438/7750/files/ritax.pdf
    • https://cdn.shopify.com/s/files/1/0434/1681/3735/files/49649599259.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/49314270096.pdf
    • https://cdn.shopify.com/s/files/1/0436/2217/0786/files/30319696455.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/pabivenomuxafavetamot.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0647/files/spell_check_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8037/files/wuwojaxogowonuvurabupof.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/38050023670.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/30711120268.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/36224167283.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/febotuzamofex.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_off0000755a.bin
193b7d72f3bb3217f58b04cf49d111321c9e1701456ae951bdc1999ddae36c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755A 5196 bytes
font_01_sfnt_off00008709.bin
3db0edf0d6764ac3b5c075e51844234502b2ca99c825d09852fc8733abb3e66f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8709 1888 bytes
font_02_sfnt_off0000901c.bin
4cbb2082b42d57d5752b4e29166d513295156de2bfc09749a131019a2c6c3e7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901C 15516 bytes

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