Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdb9a1d1b355afa…

MALICIOUS

PDF

66.3 KB Created: 2020-09-04 01:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7df34bdee622c28d48bd7bc2b9d1f5 SHA-1: 0a18ae3c60d168315f9144119fe000ed968a1767 SHA-256: 0cdb9a1d1b355afaae4a3d4ed23c2de68edd53d0ec910dcb38dcd8a6251f73ac
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.club'. Additionally, a high-severity heuristic indicates a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running malicious code. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the phishing and execution attempt.

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.club/wix?keyword=unity+android+sdk+folder+mac
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/sensory_integration_and_the_child_ayres.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/nukagonegirus.pdf
    • https://static.usrfiles.com/ugd/7f46b5_96e94bbab52849fb9a8d2680cd8ce20c.pdf
    • https://static.usrfiles.com/ugd/e4ff69_88d93a2cbb8e4452bc789e18419d5807.pdf
    • https://static.usrfiles.com/ugd/866690_6fa2e45a5a4f4bf3853cdefc380889cb.pdf
    • https://static.usrfiles.com/ugd/b85eb0_199c66d0f26d458fb83d4a7801aa923e.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/biodata_format_for_marriage_for_muslim_girl.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8080/files/five_go_to_billycock_hill.pdf
    • https://cdn.shopify.com/s/files/1/0456/9822/0188/files/nitalatibemidifakuveneg.pdf
    • https://static.usrfiles.com/ugd/113e89_1e7b142832c84d1284a325db477eb631.pdf
    • https://static.usrfiles.com/ugd/eda9ba_323bd6da19df424d84303c6c86490a19.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_off0000b9f8.bin
f8d2308fde0c5dd15c5b06b66d5f9b99e7d4095eb3b731518a1e770dfb7bd3ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F8 5324 bytes
font_01_sfnt_off0000cc15.bin
a694f62718eab40ae61acf844486ea0c6e90c252e0d8e2105f10a9bd73a441a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC15 15624 bytes

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