Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ab482e71c79fad…

MALICIOUS

PDF

37.7 KB Created: 2020-08-16 13:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfae0390b374d5596a964761a1cb1d5c SHA-1: 37cf6335a83ff9a14d55dd71457e78040a42effb SHA-256: f2ab482e71c79fadfab07f34550312d6cb400a95b7b7ca6dc9b74ccbf2525470
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with redirector infrastructure or potentially malicious content farms. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=acls+algorithms+pdf+heart+and+stroke', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=acls+algorithms+pdf+heart+and+stroke
    • http://files.lepopupusa.com/uploads/1/3/1/3/131398131/ac37b7.pdf
    • http://zukuriri.highwaywalkers.com/uploads/1/3/0/7/130738799/530648.pdf
    • http://nifazak.outoftheboxfamily.com/uploads/1/3/0/7/130739173/sezapigogu_fewafimovex_vagabuxin_pigofutipi.pdf
    • http://files.kalbproject.com/uploads/1/3/1/8/131871390/vuzexevonovigam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/62410824685.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/29956018436.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/3612535262.pdf
    • https://cdn.shopify.com/s/files/1/0432/1450/4093/files/fuvemigozilodejodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/dofirosebimuxibupefafenew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rexalomofovuwazeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/36243010236.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/jspdf_autotable_rowspan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/wamuxamox.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/41823544004.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_off0000531e.bin
897f7e67ad8e733244aec14e9c42aa9556a3f3102321e21deec089aad5bb9573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x531E 5624 bytes
font_01_sfnt_off0000660e.bin
af02dbe38abaa95fe6a05e170c4d94ec4ed46538208ef6fd32ccf109b201e8db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660E 10628 bytes

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