Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4eb2fccc1d03fc4…

MALICIOUS

PDF

63.1 KB Created: 2020-08-29 08:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bb153cb233edc7f106070fd3d5abfd9 SHA-1: 04f48467a82f9562a6a0099156880a669bb802eb SHA-256: c4eb2fccc1d03fc4ca4316b622b1d0b28463708f3db585dd727202f60ca51435
120 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'L'informatique pour les nuls pdf gratuit' and the URL `https://ttraff.ru/wix?keyword=l%2527+informatique+pour+les+nuls+pdf+gratuit`, indicating a lure for users seeking free PDF downloads. This link is the primary indicator of malicious intent, likely leading to further compromise.

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=l%2527+informatique+pour+les+nuls+pdf+gratuit
    • https://static.usrfiles.com/ugd/b8c837_4a646338c86f4a83885676201460208a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d542515fd38342aebb0df5f539d64902.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b4d2f54a45f4482b425ffd9f1605dfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_0afa4b2a84a64e9baa824f45f18a3dfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e20cf22dcff4ccd9db6f99ace2f907b.pdf
    • https://static.usrfiles.com/ugd/b8c837_a96ba4d53c5d49dcb42b83e3e8453bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_25c13feeb3984f12b9e95bd3a6e0c349.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc1238428dcf4ae9b46b6b07ae68358b.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/wunuwiwafufefag.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/38074267110.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/fedukixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/82854393796.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_off0000b39b.bin
98688bec0f187391854a09f6e7452176aa2f15fa50224c6b08396197fc22879c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB39B 5460 bytes
font_01_sfnt_off0000c60b.bin
3c9c29d30c875f4121a127a6c9f5f441e1a830a53ee0f1757d8f3eef4352bb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC60B 12912 bytes

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