Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68d275ece707f69…

MALICIOUS

PDF

42.4 KB Created: 2020-08-15 01:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be4a2b6f55fc24f3a01a0f91ce6de06e SHA-1: f3236d727af9f9f147738884bc7dc552ee6477f0 SHA-256: b68d275ece707f69068d93153773fa9cd05ff0579b8e5d58f9f3e19b94339e84
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sas+import+excel+all+sheets'. This URL is likely used to redirect the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, potentially for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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=sas+import+excel+all+sheets
    • http://nibem.hrcchicago.org/uploads/1/3/1/8/131857631/3640184.pdf
    • http://files.headplaces.com/uploads/1/3/1/6/131607662/gipebez.pdf
    • http://files.palmettoeap.com/uploads/1/3/1/3/131398560/mudomukewale-zujibugu-gokewagisolev-bagifegudinixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/capablanca_chess_fundamentals_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/49871679384.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.pdf
    • https://cdn.shopify.com/s/files/1/0447/1701/5194/files/audiobooks_kodi_2017.pdf
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/182113885.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/24823697497.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73768917897.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/path_1_3_3_9_0.pdf
    • https://cdn.shopify.com/s/files/1/0450/3165/3526/files/nasoxarupusutab.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/73085676926.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_off00005daa.bin
f0e147c09960136ff2c10e14a26bac2c80c49129a0dbc67920daa49e896f1e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAA 5344 bytes
font_01_sfnt_off00006f9f.bin
3c8c70e95e172d87f88249f6e98f5fcd1d779dd22b9512bb6276049fa774e71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9F 1940 bytes
font_02_sfnt_off000078d7.bin
55a13b3c97987902cddc73e7f66ced5502765cb6929baed4c42b9e97a5191e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 10524 bytes

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