Malicious PDF — malware analysis report

Static analysis result for SHA-256 b344b294e9d91acc…

MALICIOUS

PDF

76.2 KB Created: 2020-09-03 00:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f104582259da7d100cc8211236c94f9 SHA-1: 0c4b55c15ecb5a4822902efc48f5bd49fe7517f8 SHA-256: b344b294e9d91acc36dbf7d727d1f667b5cb907c55c59c7ab8b98d8647aafb1e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=brown+noise+generator'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The presence of a PDF link farm heuristic further suggests a tactic to increase visibility or distribute malicious links. The document body, though heavily obfuscated, contains the same URL, reinforcing the redirection attempt.

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.me/wix?keyword=brown+noise+generator
    • https://static.usrfiles.com/ugd/3ce946_7ec147b408c24d27bb47963cb6c18c9c.pdf
    • https://static.usrfiles.com/ugd/0af078_7e06613cc7304ec8b7830bed3c74beb4.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_efeba3e5f9e14c06a266f8b9f78c2ebb.pdf
    • https://static.usrfiles.com/ugd/3aca14_d43233b0377647349cf45d131ee9a276.pdf
    • https://static.usrfiles.com/ugd/47b1e8_23deaf2547b747a1a4fea1d3d877245d.pdf
    • https://cdn.shopify.com/s/files/1/0429/9125/5713/files/zafibukazizozebagafumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/bivoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5892/0610/files/nuvuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/sovulinirur.pdf
    • https://cdn.shopify.com/s/files/1/0463/5007/4017/files/conan_exiles_silver_of_the_unfulfilled.pdf
    • https://static.usrfiles.com/ugd/4ae4db_9fff95c0459248c7ae1942aae6b3fb94.pdf
    • https://static.usrfiles.com/ugd/b8c837_e32663d164b94940a19c6eeb3fa24506.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_off0000de62.bin
7b6d6f8add60c00d6b752de385c008104c324d2540861547a797e0c687741588		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE62 4748 bytes
font_01_sfnt_off0000eea1.bin
70d085f82a41067e79a587cd89a4fed6d3b3251e325c6ad7fbdb75d0ebb00df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 11620 bytes
font_02_sfnt_off0001146e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1146E 4324 bytes

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