Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb415dde5447e2d…

MALICIOUS

PDF

52.3 KB Created: 2020-08-17 06:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e712a0d52a711dabe64f7b416ff899f SHA-1: 47cb8ea42bed408cc222c3d3cc095b9268e0f891 SHA-256: 7fb415dde5447e2d5d4b585a8ad8a9ead4e4b03afd4832e32668d7326fb300ac
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=my+lord+the+baby+questions+and+answers, which is likely used to redirect users to a malicious site. Another embedded URL, http://files.bigbrobigsis-shelbydarke.org/uploads/1/3/2/3/132302710/runaneno_jivosifizidexim_kakaxakugijo.pdf, is also present.

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=my+lord+the+baby+questions+and+answers
    • http://files.bigbrobigsis-shelbydarke.org/uploads/1/3/2/3/132302710/runaneno_jivosifizidexim_kakaxakugijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/gozebixawaxamogusixijak.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/77594352404.pdf
    • https://cdn.shopify.com/s/files/1/0431/8203/1007/files/12788802646.pdf
    • https://cdn.shopify.com/s/files/1/0439/6105/7438/files/18166086127.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/savegubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/vapax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90841244024.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/80734840104.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/21314336662.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_off00007f43.bin
6258468a60cf587360bf496e765ed68099fa3885acc549775c8ae5aa8c92348b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F43 5260 bytes
font_01_sfnt_off0000912f.bin
a1c060c2e0bffee0c538114a88569db0af86d681c0b29becaf8c7770c3910edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x912F 10392 bytes
font_02_sfnt_off0000b4a6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A6 4324 bytes

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