Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28ecbe63095438c…

MALICIOUS

PDF

37.8 KB Created: 2020-09-02 09:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd413a8709fea890386e1fe454a234e SHA-1: 81f6f9018af959845eb9fab64b13881c81c16b5a SHA-256: a28ecbe63095438c7400076e2e43530bcd2b380dc07ba2c4c53b338192d56d50
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used to create link farms for SEO manipulation or to host malicious content. One of the primary links, 'https://ttraff.me/wix?keyword=i-+5+siskiyous+weather+report', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector and the link farm heuristic strongly suggest a phishing or malware delivery attempt.

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.me/wix?keyword=i-+5+siskiyous+weather+report
    • https://cdn.shopify.com/s/files/1/0437/7044/5982/files/mijaxak.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/49581680415.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0650/files/6833223956.pdf
    • https://static.usrfiles.com/ugd/3d0627_1c0529cd0c84443fa898e22d9f3fee8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5f3da769b44a55b7a000acd9b8f06c.pdf
    • https://static.usrfiles.com/ugd/b0b521_3b34239a03d840eab647cd4f0436b585.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6c68ede7ab4d0985bd823f7434ac85.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/blood_cell_differentiation.pdf
    • https://cdn.shopify.com/s/files/1/0432/8400/5032/files/rawiresezowewag.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/jinekudulafuwag.pdf
    • https://cdn.shopify.com/s/files/1/0451/3719/9257/files/zalexidajod.pdf
    • https://cdn.shopify.com/s/files/1/0438/3172/2146/files/ancient_egypt_gods_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/11901508004.pdf
    • https://cdn.shopify.com/s/files/1/0434/2140/1237/files/41839963015.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_off0000559a.bin
297c057d6c6ed1bc59fb3fda02e8ac7be44851b1529fc9ba02dd498da74864d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x559A 5228 bytes
font_01_sfnt_off0000677e.bin
dcc34a24c0be6e4e838653fc59ef8b19427e6b2b15244bbedd5475766a7dfdc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 10336 bytes

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