Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ebb5816dd0f0e0…

MALICIOUS

PDF

72.0 KB Created: 2020-08-04 20:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79d0390f30e7ac37552c407b8b2bffdc SHA-1: 70de4c7dba8ab17ad2c88f4177c2c1bfdf3f8711 SHA-256: f4ebb5816dd0f0e0a23df5c7547041e5bcac8e2193c3572344495dde7ba59354
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=lan+topology+pdf, which is presented as a "Lan topology pdf" to deceive the user. The document body is heavily obfuscated, but the presence of the malicious URL and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly suggest a phishing or redirection attack.

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=lan+topology+pdf
    • http://files.regenbiopharmainc.com/uploads/1/3/1/3/131381540/840e68c872d5.pdf
    • http://files.cejdentalaccountants.co.uk/uploads/1/3/1/4/131436956/runokunivilejaxinabe.pdf
    • http://files.designphotographyportrait.com/uploads/1/3/0/7/130738700/lexiweteriwu.pdf
    • http://files.gracechurchchanute.org/uploads/1/3/1/0/131070309/kisukobit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/77086391710.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/jewapuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/26389661014.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/nsou_pg_assignment_front_page.pdf
    • https://cdn.shopify.com/s/files/1/0436/5592/1822/files/vafadidixenig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vijob.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/wivigonowiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/2041/7181/files/kenpo_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/liwetabamopabuwijupapipan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/femepotufitaxaturu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/71096209024.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_off0000d031.bin
b7022c870b955de53443aa267653d44c3a01ddd94e51a8e1f44758bf66236edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 4600 bytes
font_01_sfnt_off0000dfec.bin
60a2c6b4ed89e0944c141f352cd32a43186c0a1687f72a136098d51659e69a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEC 10820 bytes
font_02_sfnt_off000104ea.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104EA 4324 bytes

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