Malicious PDF — malware analysis report

Static analysis result for SHA-256 63499c8d5463ccae…

MALICIOUS

PDF

54.4 KB Created: 2020-08-30 19:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 684c1e4e8f1e7edb9d688be61986421f SHA-1: ab973cd623ed3a8dc87dd6516501b589793ceace SHA-256: 63499c8d5463ccae2b98601a0d7f9b1609b4697e74e85b44ade1295a0fe84e0d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=revolutionary+army+one+piece'. The presence of a link farm and a malicious redirector suggests this document is designed to lead users to malicious websites, potentially for phishing or malware distribution. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also attempt to trick users into executing commands.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=revolutionary+army+one+piece
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_935a8343ec544018a841e5ed105e3f9f.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_af40cd019fe949c986d0c16f978538ad.pdf
    • https://static.usrfiles.com/ugd/5a1791_47f99744a40e429390e661477b6aeb22.pdf
    • https://static.usrfiles.com/ugd/b8c837_922d640a9751425b9e720093c48995a0.pdf
    • https://static.usrfiles.com/ugd/ac72e0_c232fc2ce6bd4924a87f8672037c6d75.pdf
    • https://static.usrfiles.com/ugd/b8c837_9548bc96a7074bd3b6b505c4f8f6eca4.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0183fa233b04eaba1a5c57c03c6be3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b100a3be4a034c869ea71974aaa80930.pdf
    • https://static.usrfiles.com/ugd/07625c_e9cb1a2978cc42c0b0f988cc401558c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f729a6cd084929a663a34438542b81.pdf
    • https://static.usrfiles.com/ugd/23b571_609e71a1a603478ea047567fe3d8a257.pdf
    • https://static.usrfiles.com/ugd/b8c837_38d88a5e05be4ae1b94398722fe55f31.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b933f5f6e99408eb214fd4efcbba7dc.pdf
    • https://static.usrfiles.com/ugd/2813e2_5b55b424fbed43f99542434945d861b9.pdf
    • https://static.usrfiles.com/ugd/83b1b3_03d968e51cea40f4afc4847787ffbabe.pdf
    • https://static.usrfiles.com/ugd/b8c837_72c5ec11d5c444f1aa132617d50e0fc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5423c5b111fe40129d672af19baa3b33.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009900.bin
d04384f28559cbfb9141ab787205c17b154f630d43a7f663e822f7249496c81f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9900 5072 bytes
font_01_sfnt_off0000aa3b.bin
fe9d1d55b37781195aabe60c71a3a88650015b492287fdf053014a724eedfa49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3B 9944 bytes

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