Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac6789383310336…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 03:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8434e07a0890edf837a3877fef5f23e8 SHA-1: 4d401aa3e3a1c340319a69a0f676e019d8ad80bf SHA-256: 3ac6789383310336f31ae79bc9cf4ca9dfbd2ec13d8a3dfd9929f37993f2b84f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=3ds+emulator+ios++no+jailbreak'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The file also contains a large number of embedded links, many pointing to 'static.usrfiles.com', which is flagged as a link farm. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.cc/wix?keyword=3ds+emulator+ios++no+jailbreak
    • https://static.usrfiles.com/ugd/67e251_996ff3aefb1f4e9790b4cd9978e7f92a.pdf
    • https://static.usrfiles.com/ugd/234f58_b7f30e82f87747139fed18ff29f316bf.pdf
    • https://static.usrfiles.com/ugd/67e251_7fdd5e8ab8bb465b8dbaf63f6ed62ee3.pdf
    • https://static.usrfiles.com/ugd/b8c837_190d8abef2c64a88b1d03a9bea354686.pdf
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/gelevakev.pdf
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/sigunakiredikimezagap.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/tiduviterugesokubodag.pdf
    • https://static.usrfiles.com/ugd/b8c837_93d019b8bbcd4ebda7b4fe1d0639c6ba.pdf
    • https://static.usrfiles.com/ugd/54fa57_31643d37b0ae44ab8168425b1f1137fc.pdf
    • https://static.usrfiles.com/ugd/4f270c_ea20ddbc14e0414aa06ad8824b07136f.pdf
    • https://static.usrfiles.com/ugd/738632_8d62e3c168ed4b87a65c9a3084ff2d34.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd07e64e78e742bd9d6d4af57451afde.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fd8ef06d5e1496ba36508712f43b540.pdf
    • https://static.usrfiles.com/ugd/b8c837_d078420971214a67ad774ede501d4b52.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dd8.bin
f1f6dd5457fd9c663b65f0406c3e8a83e3c84bb362c4b8b35adda14fe3dc3c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 5204 bytes
font_01_sfnt_off00006f64.bin
d867b4d0ec6ec8c01c17ec03ff01f6cf816a735105642145b8e599409f3ad5ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 10120 bytes
font_02_sfnt_off00009211.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9211 4324 bytes

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