Malicious PDF — malware analysis report

Static analysis result for SHA-256 372ad2f92deec2aa…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 04:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 786205a80c2f76e59aee454f2428d8cb SHA-1: ff799d3cf0563371db5780d9d8c28b5b5ea6e23d SHA-256: 372ad2f92deec2aaa4780a58304bbba6c18b4a63517c7e4d52c286adde51fc99
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=garanti+cep+%25C5%259Fifrematik'. This URL is presented within the document body, disguised as a security alert related to 'Garanti cep ifrematik', likely to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com. The primary malicious IOC is the redirector URL, which is designed to lead users to a malicious destination.

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=garanti+cep+%25C5%259Fifrematik
    • https://static.usrfiles.com/ugd/b8c837_7126a32b991b40a094026de72dcea7e8.pdf
    • https://static.usrfiles.com/ugd/3e87bf_98563135fe854dfca5886f91556304db.pdf
    • https://static.usrfiles.com/ugd/accd1f_b7861992b6b54bd689dd9ddccfe8a717.pdf
    • https://static.usrfiles.com/ugd/e73fea_2c25a369965746fba33b6dc81156e433.pdf
    • https://static.usrfiles.com/ugd/19103d_73bd38aeae7244a3a479b7349f3b44e4.pdf
    • https://static.usrfiles.com/ugd/912de2_f2bb1dfa051b46d3804316dd278162a0.pdf
    • https://static.usrfiles.com/ugd/8b4172_7285a01e343d44e1b28522bf5023c7b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b89788869c5943fcbffa2295ffcc492d.pdf
    • https://cdn.shopify.com/s/files/1/0463/3110/1346/files/vijunedonusutevoka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wekisod.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_off000057f3.bin
5e2c13f72fead796165cb0316c0898eb882e1d9b17892f69a5eb6915c165ca86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F3 5296 bytes
font_01_sfnt_off000069e4.bin
5cf4207b3ad5f698206badb0b34f9f66d0cc8e7004e1a1094c0a0b35ed03f3c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E4 12376 bytes

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