Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4394d989497aef…

MALICIOUS

PDF

99.4 KB Created: 2020-09-01 05:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92223a50c3b2699d57f5772aeea65a70 SHA-1: 212f75da57d4d03aa76b0df54a0aa4ba8af639e3 SHA-256: 2b4394d989497aef02a46863b391a117f64d3a657e329a665795748e7f6b3e00
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'Bts love yourself answer heart' and the URLs suggest a link farm tactic, likely for SEO poisoning or to obscure the final malicious destination. The presence of multiple Shopify-hosted PDFs further supports the link farm hypothesis.

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=bts+love+yourself+answer+heart
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/72297548029.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/sijajabozaxevapulemimag.pdf
    • https://cdn.shopify.com/s/files/1/0459/2707/1911/files/rejixeguze.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0e62151f5aa4009897c31c951668580.pdf
    • https://cdn.shopify.com/s/files/1/0447/6711/7463/files/reddy_and_reddy_agronomy_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/2624/0920/files/gamerz_gaming_website_gta_5.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4229/files/16871616715.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/13390722097.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/6004492109.pdf
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/sepadejupugipesitedepor.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/rogipubuzilorav.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/vexuxuxefona.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/16076043978.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/21209915389.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_off0000ce29.bin
069d9483a70e80eb27c8caee9c784b0dc1ced7cac4ae82efd8806fe22ce28ec8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE29 37780 bytes
font_01_sfnt_off00013e5c.bin
e1a3d28ec903d8321ae285767c5f7ff615c8a011c83d1eb918f681de62cca3d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E5C 5156 bytes
font_02_sfnt_off00014ffc.bin
d03626c43ea050b492b41b27e359fa5e8ff4ade6f7cadaf35d82507d5e4c5f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FFC 15948 bytes

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