Malicious PDF — malware analysis report

Static analysis result for SHA-256 24aba85cc2c8d523…

MALICIOUS

PDF

66.7 KB Created: 2020-08-30 09:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bc845ee8d682964d054012a3dbce961 SHA-1: 83d9cd6b4513698023e920a487536c1070e2203f SHA-256: 24aba85cc2c8d523b49c5964ac538cf7ab2fe321664029aaa72c46b30a9080f9
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link. This link, https://ttraff.ru/wix?keyword=charge+d%2527exploitation+plancher+eurocode, is likely the primary mechanism for delivering a malicious payload or leading the user to a phishing page. The presence of a large number of external PDF links also suggests a link farm or SEO poisoning tactic, potentially to obscure the malicious redirector.

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.ru/wix?keyword=charge+d%2527exploitation+plancher+eurocode
    • https://static.usrfiles.com/ugd/e73fea_20b3d48d2f8c4db5b5b6cbb73b1f1f19.pdf
    • https://static.usrfiles.com/ugd/7ff653_c6efdecb38304df3afe62867cf66f718.pdf
    • https://static.usrfiles.com/ugd/b8c837_0394808d7bf8439389b815fea504f58a.pdf
    • https://static.usrfiles.com/ugd/b8c837_568e325d6963403fa4f5d04a7cb6b689.pdf
    • https://static.usrfiles.com/ugd/5bb01c_29e4c71801eb4454bda03a6014c24a86.pdf
    • https://cdn.shopify.com/s/files/1/0432/8423/4398/files/buvune.pdf
    • https://cdn.shopify.com/s/files/1/0430/4214/4407/files/kazopulofa.pdf
    • https://static.usrfiles.com/ugd/b8c837_43c840659fd2480593c52aa8e440cea8.pdf
    • https://static.usrfiles.com/ugd/b8c837_24a2109d6d6a4ef2a82f3fb2642d547c.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7543a49c0ef427ab294ad4b80b9a20b.pdf
    • https://static.usrfiles.com/ugd/b8c837_de9313b406d64784937543534630954f.pdf
    • https://static.usrfiles.com/ugd/e3c460_75476863dd944e688a82febfa838ca81.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_off0000b072.bin
1f40dca578154b217684f7ac2f7523ed1c1d0bfa2c9cfd53d3ad9ff62d4e59c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB072 5164 bytes
font_01_sfnt_off0000c20b.bin
d3ecf3fdb0fe8e351e7b67aa13c1db460eaddc59c1f52e0003641c43596df0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC20B 15136 bytes
font_02_sfnt_off0000ef78.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF78 4324 bytes

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