Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd052e699e5b346e…

MALICIOUS

PDF

33.2 KB Created: 2020-08-30 05:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a69a23b63bf033ef54cbf9f41c71bb9 SHA-1: b698af75c008773f6f8da89a0a191e83d9565f67 SHA-256: fd052e699e5b346e73fadb0bb9f8fe2f3aeca008135e1af2efd1e3a2e8ec6a78
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=winchester+model+62a+owners+manual', is the primary indicator of malicious intent. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF documents, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient to classify the attack pattern.

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=winchester+model+62a+owners+manual
    • https://static.usrfiles.com/ugd/b8c837_1ce3fa0bcc4a4e9384b5cdd3b24dc632.pdf
    • https://static.usrfiles.com/ugd/efb3f0_1478198762e34b8c8eb8b8f72009256b.pdf
    • https://static.usrfiles.com/ugd/e3ff21_2451fa06aa8549d5b3c9c0293eb1f9b5.pdf
    • https://static.usrfiles.com/ugd/804ff6_63de45b6961b4d9680a7010a18550ee6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab2b05f74c414cb7b4fb22603b6603d8.pdf
    • https://static.usrfiles.com/ugd/ee4a13_31a17327c03948c7853044a48f4a7b6f.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/wodilaxoweb.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/27026216624.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/xabokosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/97953087190.pdf
    • https://cdn.shopify.com/s/files/1/0454/2994/8572/files/excel_dart_cricket_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovabokuvuxinapuwukiberem.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/que_es_el_contexto_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0457/6821/2646/files/malayala_manorama_calendar_2013_free.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_off00004396.bin
ef7039d4bf4e939ec9970b37a8f479ce94662ad7748d82549085a4af851c3f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4396 5568 bytes
font_01_sfnt_off0000566b.bin
01d3b0ee05dfffe2a29cc94db8fbe5496c1bced0992803778a705826e6481eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x566B 10204 bytes

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