Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c298cb09341f0e4…

MALICIOUS

PDF

41.8 KB Created: 2020-09-06 03:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a7e4a8a15b2ae387f59c3f82064ff25 SHA-1: 815efea5037e89392b5c6d68797035cb9b5634e8 SHA-256: 2c298cb09341f0e41a5b7b807129af53ac382a1f1dc92a40f4df7856828672f2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files hosted on Shopify, a technique often used for SEO manipulation or to distribute malicious content. One of these links, 'https://ttraff.link/wix?keyword=social+media+platform+demographics+2018', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be generated by wkhtmltopdf, suggesting a programmatic origin for the link farm.

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.link/wix?keyword=social+media+platform+demographics+2018
    • https://cdn.shopify.com/s/files/1/0431/8229/3151/files/64030149947.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/organic_chemistry_7th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/livro_administrao_da_produo_e_operaes_ritzman.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/18390148293.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/dazewazew.pdf
    • https://cdn.shopify.com/s/files/1/0463/9725/9931/files/baby_shower_invite_template_microsoft.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/51973780352.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1374/files/wodosepijogatupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/value_of_playboy_magazines.pdf
    • https://cdn.shopify.com/s/files/1/0462/2440/8730/files/56670399969.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/schermerhorn_management_13th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9720/files/bee_swarm_simulator_hack.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/bookmarking_a_file.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_off00006206.bin
58efb33e05f260a396f38f8f462fbe5aa0d7d848d20ca5a4cc60301b47bfc0e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 6192 bytes
font_01_sfnt_off000076ec.bin
72a2fd25b23b37db651b9a942a0a02503fd2aa25b5f5c661f1bd37d30e20f475		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EC 10440 bytes

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