Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75a25e61defa319…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 09:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3747514e42eecadbdc1d075b6baba4c SHA-1: da0a2a2ca9708922462530c602e209e3f29185e0 SHA-256: e75a25e61defa319bc9f3b0dbb6e600088de50ffa0b67b05352e102a9b79d545
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is part of a link farm designed for SEO manipulation. The document also contains a visual download button lure and instructs the user to interact with remote support tools, suggesting a social engineering pretext. The embedded URLs and the PDF structure indicate a malicious redirection attempt, likely to deliver a secondary payload or phish for credentials.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=bookbub+free+app
    • https://cdn.shopify.com/s/files/1/0440/1260/1502/files/16507828698.pdf
    • https://cdn.shopify.com/s/files/1/0440/2328/3862/files/caesar_cipher_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/13386751331.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/kejuduwivadawesegobowa.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f8db4302e5f4fa99060525ba0e440dd.pdf
    • https://static.usrfiles.com/ugd/8de238_e4c1b6d7f8394a8cac9e4752b1609944.pdf
    • https://static.usrfiles.com/ugd/3f80ec_c7828c08723f471baf470ca49be60b91.pdf
    • https://static.usrfiles.com/ugd/ea78e0_6782783c755a40aab09b0c525598fc6c.pdf
    • https://static.usrfiles.com/ugd/565485_937bc0e89a9f42389b4affdb2c7e6d81.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_off00006927.bin
bb25c57dbeb8d2d6b2868827924fb1100c4850cc41cfb61b8430468fbc8677d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6927 4940 bytes
font_01_sfnt_off00007a09.bin
12594249ca9a6032759dabaa0b4505b850295c5ba09918b1817f892d9a1c26ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A09 9980 bytes

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