Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb74820f6361fbc…

MALICIOUS

PDF

39.3 KB Created: 2020-09-05 00:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d82b700cdb77dc2f832712ba2d4ef28 SHA-1: 1bc6b4d3f17b90b241cd81a6c374305277bb2490 SHA-256: ffb74820f6361fbc5dbaeb769b816d8ddf2896384ad1b6418093e7785b2fb76d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated, but the presence of the malicious redirector URL and the PDF_SEO_LINK_FARM heuristic indicate a likely attempt to lure users to malicious content or manipulate search engine results. No scripts were extracted from this sample.

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=child+44+tom+rob+smith+pdf
    • https://static.usrfiles.com/ugd/2f3216_c9fb1cb51b8a42b6b8394d3d0080c8ad.pdf
    • https://static.usrfiles.com/ugd/111c46_9388a21cd76144d4a481b5603f05a5c0.pdf
    • https://static.usrfiles.com/ugd/81ef4b_4f78096c5f514a94b5fd5ccd8b05da0c.pdf
    • https://static.usrfiles.com/ugd/52b593_079f43c776cd4ef2b3759830344252f8.pdf
    • https://static.usrfiles.com/ugd/4b7290_dabc2c8d905a47fd876f97a1c88d9b5b.pdf
    • https://static.usrfiles.com/ugd/39a0fd_906df655f1bc4f1f84ef0aef2d5288c3.pdf
    • https://static.usrfiles.com/ugd/6846fe_a6a8e363e2fe40a58bfb38f85ba46529.pdf
    • https://static.usrfiles.com/ugd/87a178_e0b9638a28e84519900f1d8609311b60.pdf
    • https://static.usrfiles.com/ugd/df7b34_8f20e9a3a5444aefbb6790f68325a1e4.pdf
    • https://static.usrfiles.com/ugd/eb6612_6d24add3297d43f094282d1580046642.pdf
    • https://static.usrfiles.com/ugd/96768c_e9ab8855d2e348fb8c73cdabad749174.pdf
    • https://static.usrfiles.com/ugd/b8c837_308bbcb111da4e6ebd05f5c33c41ef21.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_off00005dd5.bin
79f858a5b03034c8a13056c5cc6e14e82619d88bca136684bdabe0222ab5aa1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD5 5204 bytes
font_01_sfnt_off00006f54.bin
36c4eb635ae6e3adfe93cf4573eea65b82c537c0a77d85ea508a1ee50b921c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F54 9860 bytes

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