Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d6184d2b22ff5f…

MALICIOUS

PDF

43.4 KB Created: 2020-09-01 17:23:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d508fde42fc3acba1586c2bfa8544cf SHA-1: 285fb8a179b3a1a619fafd798489ee30adc74920 SHA-256: 21d6184d2b22ff5fc6e7e5a999bb2daa2d72c5220dbe860c51a93fd65ea4736a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF document contains a mass of external links, including one to a known malicious redirector at 'ttraff.ru'. The document body text, though heavily obfuscated, appears to contain the same search query as the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous benign-looking Shopify links likely serves to mask the malicious redirector within a larger 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.ru/wix?keyword=spider+man+3+games++for+pc
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/bilosubub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/2137/5387/files/rick_ross_mastermind_zip.pdf
    • https://cdn.shopify.com/s/files/1/0440/8085/7253/files/linux_device_driver_interview_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/roxominokulagumoxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/kuluvozewuzi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7277/4556/files/12250692154.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/zexuxekejikovejetuva.pdf
    • https://cdn.shopify.com/s/files/1/0438/5865/7430/files/noluderujijavugobez.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/tixakerebalanipojogusefu.pdf
    • https://cdn.shopify.com/s/files/1/0463/3195/3309/files/bharata_rajyangam.pdf
    • https://static.usrfiles.com/ugd/34e21e_347913e312c24808a47620e666de3956.pdf
    • https://static.usrfiles.com/ugd/eb4c03_65355c16a59c45b2b599f2991ee121b5.pdf
    • https://static.usrfiles.com/ugd/3ce946_4ce5e921ba494a42b7d1cd2fa48d7d38.pdf
    • https://static.usrfiles.com/ugd/9904c2_7940720d3b7d465fbba78da3796225e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_80cac8eeca774c5aaaac7f0051ac1ef8.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_off00006ba6.bin
84737d6d973a04838b32efb9c1895b44deaad69e8f6c35579024ebaa520f1bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA6 5712 bytes
font_01_sfnt_off00007eff.bin
896cdf7ded6f06a1a444a150fa7c6dea30dafad615a74ef6bb8813ba83b38019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFF 9996 bytes

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