Malicious PDF — malware analysis report

Static analysis result for SHA-256 f259c1920edd5734…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 14:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df7233c6a9d308c32fd26d124995177a SHA-1: 463f68844c585f3b7b1ac9c334ee9cdc192c5690 SHA-256: f259c1920edd57346711b695cfa67dd7e72cffb6cffaf3d52ba793d0267a4d3a
130 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common technique for delivering malicious payloads. The document body, though heavily obfuscated, contains the same redirector URL and a URL pointing to a PDF file on Shopify, suggesting a link farm or content delivery network for further stages. The presence of a 'download button' heuristic further supports the lure mechanism.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=george+foreman+grill+steak+guide
    • http://files.kelseyeliason.com/uploads/1/3/0/7/130740477/vuditusu_wovorisowul.pdf
    • http://botel.militoa.org/uploads/1/3/1/4/131438641/kigifomidigezetubizi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6640/7589/files/can_you_download_netflix_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/vizituturemowamogali.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/vupibuvirudusigolonuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/51855484523.pdf
    • https://cdn.shopify.com/s/files/1/0440/2397/2005/files/libopimatorej.pdf
    • https://cdn.shopify.com/s/files/1/0449/3164/5608/files/new_bollywood_bass_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3381/files/78837024012.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/sizesubowadoganevixediba.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/
    • https://cdn.shopify.com/s/files/1/0449/3164/5608/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb0.bin
2a554d9869ea036b49490a5316b63398e161b56a99142f9241d5ebbbb588dfcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB0 5320 bytes
font_01_sfnt_off00006eb5.bin
0f2a3a41d6c62d43212bb59733a586196bc11d66735862907e80ba5e6272d1bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB5 10292 bytes

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