Malicious PDF — malware analysis report

Static analysis result for SHA-256 353a3849b3f4bfe7…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 03:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84779ff270046e8bae2370bef70e9303 SHA-1: 2b04d4779efdbeaf8c65abbee53222c7c4524049 SHA-256: 353a3849b3f4bfe739f5ece1264c5019e1d38c6ae1d1133b97ad4444358384aa
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, pointing to 'https://ttraff.ru/wix?keyword=xu+fu+pet+battles'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, also contains the redirector URL. This suggests the primary intent is to lure the user to a malicious site via the 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=xu+fu+pet+battles
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/89993212839.pdf
    • https://cdn.shopify.com/s/files/1/0430/6331/2535/files/aisc_base_plate_design_guide.pdf
    • https://cdn.shopify.com/s/files/1/0461/6578/6776/files/33439846995.pdf
    • https://static.usrfiles.com/ugd/b8c837_03c10706f4274681a2791097c196dca5.pdf
    • https://static.usrfiles.com/ugd/cc03df_410b5203fccf4eb8aff9e397313a6759.pdf
    • https://static.usrfiles.com/ugd/b8c837_a90d8664a6a343a29c12e1403f3a203a.pdf
    • https://static.usrfiles.com/ugd/5cf23b_2276b9dd4faa409aaac50f6e3fb48fd0.pdf
    • https://cdn.shopify.com/s/files/1/0461/8990/4021/files/dilated_cardiomyopathy_echo_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/urine_cytology.pdf
    • https://cdn.shopify.com/s/files/1/0464/9756/2776/files/free_abc_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/bemuvazedasomotizaledib.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_off00005d07.bin
d441ced24d0d5e6507d0b8f91d343f1822439e93029122aa3fabf3873e387b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D07 4536 bytes
font_01_sfnt_off00006c70.bin
4380356f5f68cea31b948aad11adb05b0da34f6820c84f0bab679edcca6a59cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C70 10404 bytes
font_02_sfnt_off00009000.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9000 4324 bytes

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