Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc315acdd55c8bfd…

MALICIOUS

PDF

36.2 KB Created: 2020-08-30 05:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fa3c2102408b5ffe3e84b69c326fb63 SHA-1: aeb4f53106585787b75f9289b0fb79babf174497 SHA-256: bc315acdd55c8bfd31e3f9959b06e99eb209727c982731d6049bd62db4231151
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. It also exhibits a PDF link farm heuristic, embedding numerous external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious redirector URL and several benign-looking PDF URLs, suggesting a lure to download seemingly legitimate documents that ultimately lead to malicious content. No scripts were extracted from this sample.

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=immunobiology+janeway+9th+edition+pdf
    • https://cdn.shopify.com/s/files/1/0437/5481/5640/files/welaligub.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/16497326813.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/26778219900.pdf
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/5e_way_of_the_four_elements.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9e3139bcce8430f922dac828fd2f76d.pdf
    • https://static.usrfiles.com/ugd/d94ae5_a00341a9a92445edb96586b4ae2473a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51b578cdb8a458c946aa13a31110476.pdf
    • https://cdn.shopify.com/s/files/1/0461/1388/2275/files/xojonalokukibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3839/9902/files/doxabokuwesunevubipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/79795995069.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/25289611817.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/kulepevawumigibit.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_off00004de7.bin
355b7f0012c27d4b5de7490e2c19a9bb120e138264932633d014a4b1178e8210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DE7 5684 bytes
font_01_sfnt_off00006136.bin
ff99eef91bf3aa347f9db458d0024da6bc392d1a2c4b960d61da179c66c10a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 10288 bytes

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