Malicious PDF — malware analysis report

Static analysis result for SHA-256 337199ae8d8f520d…

MALICIOUS

PDF

43.5 KB Created: 2020-08-18 14:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b64dae47f4cc3f6c1d570dd8b8cc71d5 SHA-1: eaf200fcc78661b7b249f590feafd6f0478e9520 SHA-256: 337199ae8d8f520da349d029ca2f9d013df5ac8e4bb86bbde12b2f589b4e1253
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=mendelian+genetics+lab+answer+key', which is likely used to redirect users to a malicious site or download further malware. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=mendelian+genetics+lab+answer+key
    • http://rinerib.capeagents.com/uploads/1/3/0/8/130814328/5002268.pdf
    • http://files.creekviewvolleyball.com/uploads/1/3/1/8/131856039/9693390.pdf
    • http://files.russellflea.ca/uploads/1/3/1/0/131070112/bukul.pdf
    • http://files.alexblassingame.com/uploads/1/3/1/4/131482968/wijadagexe-wotiribi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9452/files/nemoj.pdf
    • https://cdn.shopify.com/s/files/1/0439/0685/9176/files/20750140832.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/47983765431.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/vavugalinojovesukowur.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/sunomuwebezuvekunofaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/sparkle_your_name_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/durapufezadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/smapi_console_commands.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/84710996271.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/77664804742.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.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_off000068c7.bin
e646ca61fbe6b43e3bf6292fa8295a8a0bd1d8d9654e20ebd548aec874025700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 5508 bytes
font_01_sfnt_off00007bb0.bin
6a7440b5ed524e0c28dcb1d6c48aa4f6e0945381dff0d8db2a6e5d85d44f510d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB0 11084 bytes

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