Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae064f5a58580204…

MALICIOUS

PDF

42.0 KB Created: 2020-09-01 05:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 989a501c671117fed4f6b6220c870036 SHA-1: 085ad5bb73e05523ac4aaa3def8c3a0f2300c146 SHA-256: ae064f5a58580204b5bc188eca178c9f17aaa03e8227286fe081ec8576abbf42
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=suzanne+vega+caramel+sheet+music'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking PDF files, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=suzanne+vega+caramel+sheet+music
    • https://static.usrfiles.com/ugd/b11f6d_36bf2c5801164069adfe4b39508ff881.pdf
    • https://static.usrfiles.com/ugd/b8c837_a307bbaee50b4c20bc0aacb279b4e8b8.pdf
    • https://static.usrfiles.com/ugd/0047a4_6b5d987137564c269a45bef0ca92adba.pdf
    • https://static.usrfiles.com/ugd/4117a9_442898a57e454d8c84b4139548edb617.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad074537707482d9ef2dda3d167778b.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/93649846996.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/oxymoron_schoolboy_q.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23582012054.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/xisejofituv.pdf
    • https://cdn.shopify.com/s/files/1/0437/4796/7130/files/junib.pdf
    • https://static.usrfiles.com/ugd/bf0735_1e340322a7a74024abfd33f6ae7f7db6.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a77fbba861a436f9ccbe225fd91bce4.pdf
    • https://static.usrfiles.com/ugd/b8c837_46a55330e7064069b522c10be6581866.pdf
    • https://static.usrfiles.com/ugd/ddb60a_52a990a6898341028dbc7d273bd488b4.pdf
    • https://static.usrfiles.com/ugd/b50c55_18375a9e726b4c16be1c1033af36c1c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_15a4f5a93a2748b7bd9503e57016333a.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_off000054c5.bin
10f9f730f422a927f9e35913cc956c4058aaafb132e551cc04569b955218833c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C5 5428 bytes
font_01_sfnt_off0000671d.bin
68c5d6fdac7ff26252e60fcfcaa509266e663e1f83c4834845de3e7e6106737d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671D 16032 bytes

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