Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90e17aeb522b9a1…

MALICIOUS

PDF

53.5 KB Created: 2020-08-29 19:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 480eba6ac19e46ac212cfb18247f11f4 SHA-1: 606e97e9922913f1a3b0ed8191db1ee70e97c1fd SHA-256: f90e17aeb522b9a16e0508efa1e8c61c28a531dfd86fffd1b3d8081a978cecd2
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=criteria+cognitive+aptitude+test+%2528cc'. This URL is presented in a way that suggests a lure for users to click on it, likely to download further malware or redirect to a phishing page. The presence of a link farm heuristic further indicates a malicious intent to distribute links.

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=criteria+cognitive+aptitude+test+%2528cc
    • https://cdn.shopify.com/s/files/1/0433/7834/4097/files/5501013836.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/memobatubez.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/the_new_real_book_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/8148/1884/files/43545421199.pdf
    • https://static.usrfiles.com/ugd/b8c837_042c9caf668d4f54969743ef43a4af95.pdf
    • https://static.usrfiles.com/ugd/60933b_885adb39a1a942a2bcf8d14e7ea3db94.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e476fb881f4d30ba11ea5f63b6d2c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa7348c0ba49440286388a7f8114c242.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bc2e08d076f4eeaba5a49481af29a07.pdf
    • https://static.usrfiles.com/ugd/b8c837_fba881b756674e429f852991f1cceaf2.pdf
    • https://cdn.shopify.com/s/files/1/0429/2683/3823/files/lusisusexadopoba.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/kivalid.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/rudaledajibasejusiza.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_off00009174.bin
091e5e1a59d92eda5e4edbc655a5186cccd033b68638329cdf99cc574ec6185f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9174 5252 bytes
font_01_sfnt_off0000a368.bin
9e5acf173ca58d5bd5797e6428de8e1bf69912955af7424368aeb0443a003909		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA368 11044 bytes

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