Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83895e97fcd0847…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 07:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a5489cc184c7ff9ae0ce54e00bca117 SHA-1: 8ad0a64b72cbcba548dd784c8e344bc56c356797 SHA-256: d83895e97fcd0847cea8dbb5b4a6117cf7d17a708d641aaa4094ad449f2bb33b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate this is a link farm designed to direct users to external, potentially harmful, content. The document body itself is largely unreadable binary data, but it does contain the malicious redirector URL, suggesting the primary purpose is to lure users to malicious sites.

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.com/wix?keyword=realtek+rtl8192ce+wireless+lan+802.1
    • https://static.usrfiles.com/ugd/b8c837_feeda288822742148fcb0f58dd7efac9.pdf
    • https://static.usrfiles.com/ugd/cafc24_8a326b1fe2c74c75aec005969cd39aa4.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_02dfefa26604451eafd0bb4223389769.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e7e9b358e25441ab400e6ce5587d4ed.pdf
    • https://static.usrfiles.com/ugd/0a052f_88aebe892a1142d0a913c50ace25d9a8.pdf
    • https://static.usrfiles.com/ugd/90c678_d58e1e38417545edbd55d264d4fd76b4.pdf
    • https://static.usrfiles.com/ugd/67f5f7_f4c63b3a0fd044f99ff9b5caabe6705a.pdf
    • https://static.usrfiles.com/ugd/49be48_833125243282468dbb8b4d989fc90ff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b320d072e39d4329a6c1eada0ae3a01d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b469bc7ffd8453a8526982b3674e4be.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e7b835acf0f44239cc725af5a94123b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdf5f146ca094003854c4e8304bba7de.pdf
    • https://cdn.shopify.com/s/files/1/0436/4202/8182/files/4335490313.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6944/files/76509363632.pdf
    • https://cdn.shopify.com/s/files/1/0439/5145/6411/files/types_of_mental_health_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/silajatawipitofepukobux.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_off000068f8.bin
b55260feebd31b4fff26d386fe86e250c94154ce4959fcf7c737fb58dc3bd7d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F8 5664 bytes
font_01_sfnt_off00007c65.bin
c31695a52da5e4b3c02e5a04f1f091588b049c1f2e012030722a16cb8cecb942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C65 10084 bytes

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