Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf057fc949673f77…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 00:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5209d627146b3c61be49dc835dade8c9 SHA-1: cd66fd77a4aaf984d6133b585097f9140b7bba3d SHA-256: cf057fc949673f7723ab7d1d98062f3ae8d049f0fee062bfc6044aa9b9792d5f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=flat+stanley+template+pdf'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL and numerous other links to external PDFs, suggesting a link farm or redirection strategy. The primary attack pattern involves luring the user via a deceptive document title and then redirecting them to malicious infrastructure.

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/wix?keyword=flat+stanley+template+pdf
    • https://static.usrfiles.com/ugd/b8c837_8f8ef4fdabd7440c9452d65214075379.pdf
    • https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.pdf
    • https://static.usrfiles.com/ugd/8e1900_d92574f6b8b849a58dcb99e5390c03bf.pdf
    • https://static.usrfiles.com/ugd/b88e3d_330e89f9f8f64c52aaff42ff34a46c1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e274c87c17b4c05b8a8f33dbef06cbe.pdf
    • https://static.usrfiles.com/ugd/90423f_1ee417c04125407c9f6f1203587b7d89.pdf
    • https://cdn.shopify.com/s/files/1/0435/0217/4374/files/principles_of_brewing_science_george.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/josuzafegeda.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/wiwagoluwaxibipesigonanam.pdf
    • https://static.usrfiles.com/ugd/b8c837_d090bb308f51431c84846676e81c1668.pdf
    • https://static.usrfiles.com/ugd/576447_4552c0a9d4c447988bc47e1cb4d17702.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_off000061fb.bin
3e881a15f3fd39c1acb852ee05eb01d822c972a7209568b8cd183b3e358c0497		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 5148 bytes
font_01_sfnt_off0000737f.bin
86f70d39d18ab33b05e3185dd81e18da33923b90e9c0c700773762263b84b981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 10288 bytes

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