Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88657359c357c84…

MALICIOUS

PDF

85.1 KB Created: 2020-09-11 17:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 152392ebf2ef7e0025498d4bf39073c0 SHA-1: e879deeaab77cfa2a451f8bea889ac19fa0c43b7 SHA-256: b88657359c357c84bd9aecf40d10613ac62d5f2665fb435de600dcc6426312ad
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, indicating a potential attempt to distribute malicious content or engage in SEO abuse. The urgency lure heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=jessica+jones+episodes+guide
    • https://static.usrfiles.com/ugd/ceb2e8_e8226dfbf399452781d3d960ed098451.pdf
    • https://static.usrfiles.com/ugd/05900a_bad100ea2137431bb9c2f228822f6de4.pdf
    • https://static.usrfiles.com/ugd/e78b77_e9f0fbcedd214eada23f6d69f1523c96.pdf
    • https://cdn.shopify.com/s/files/1/0463/7815/6187/files/jagiloxovi.pdf
    • https://static.usrfiles.com/ugd/0adedf_f2ded936e39142bfaec0183cbeb5f6dc.pdf
    • https://static.usrfiles.com/ugd/0aab01_fa038e35c52446d2aa0f2959b217368c.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/11060183098.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/24475821455.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6253/files/pisuxijazulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/livro_after_2_gratis.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_off00011067.bin
6044dd30c3ad5d4945cc1b65e4c5e044b9e2bbf6691739ff48216823e514dbe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 5176 bytes
font_01_sfnt_off0001221e.bin
8b90e30d2f37a09c314e5b1a5b974ef8214766077b38d75c2c959aa310c78684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1221E 10864 bytes

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