Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c083d5a9b35d970…

MALICIOUS

PDF

56.6 KB Created: 2020-08-30 04:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93b194abacb5121e4c3e12379bc24d7f SHA-1: e524965470a5d428d5a23bbca1eab92c9d2552a2 SHA-256: 1c083d5a9b35d970e4943a315119b25fa36284c277f049dc91c61f406d506a6f
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 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, but the primary malicious indicator is the ttraff.ru redirector.

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.ru/wix?keyword=watch+midsommar+online
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/1477215816.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/widagerusataw.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/c_getline_from_text_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2792/files/perl_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/argumentative_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/sexetibe.pdf
    • https://cdn.shopify.com/s/files/1/0460/1079/4143/files/briefing_template_government.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/36307590795.pdf
    • https://cdn.shopify.com/s/files/1/0433/9538/3446/files/bijim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9654/files/78781751288.pdf
    • https://cdn.shopify.com/s/files/1/0433/7414/9793/files/logo_quiz_extra_levels_minimalist_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/45231073252.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/instagram_direct_message_apk_for_pc.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fe114e92fed432bb41651a335f86c31.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ee74ab9be734382adc4f1d9a70bd5dd.pdf
    • https://static.usrfiles.com/ugd/7baf93_fe2d1b0587ef4f62913ff74b5edc2ad6.pdf
    • https://static.usrfiles.com/ugd/2c8d66_bc4b2c26d90e495db5247c56344e0e2a.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cd9.bin
e75ce237772ab9a892a4754ea2842fcd771b4bf9b9d3eb15e841f9f2349a8717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD9 6552 bytes
font_01_sfnt_off00007cf9.bin
53471a66971cbca149b86ba33c2e30595d0152607ed03c72816a723b00ff491f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 5192 bytes
font_02_sfnt_off00008e76.bin
50ca125b0d257618552ed7dbde28693f79a27622ef902a95d7f43f51e5adca70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E76 2240 bytes
font_03_sfnt_off00009890.bin
9b1329efab62a34181a4f60d40b4f005ca8faaaddaa72edd21cd9dd6413b5adc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9890 10252 bytes
font_04_sfnt_off0000bbe5.bin
03ee38c050afbc1d56ace2e602d694e5bcb4c62be0b30a22a51a7c3d75dd8b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE5 16632 bytes

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