Malicious PDF — malware analysis report

Static analysis result for SHA-256 a187f1ddd9e32d3e…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 16:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 504d5eb22e9a48cc50f664faf6cac53c SHA-1: 9eed896622320571b04d8e02395ab685eb9a9aa2 SHA-256: a187f1ddd9e32d3efa9942b25fa9d7095a74e3c9602015db767e7e1542892e48
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking URLs, suggesting a lure to trick users into clicking the malicious link. The primary intent appears to be directing users to malicious infrastructure.

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=mysql+workbench+ubuntu+14.+04
    • http://tugakufuk.retrofitzclothing.com/uploads/1/3/1/4/131452883/5472136.pdf
    • http://files.faithinhealingmassage.com/uploads/1/3/0/9/130969140/21677.pdf
    • http://nipewasev.plantsandfriendstogo.com/uploads/1/3/1/0/131070450/fovajilig.pdf
    • http://files.kamawellnessperth.com/uploads/1/3/1/4/131453111/faee01bb6bf2cf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/canterbury_college_school_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83300066175.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/uc_browser_mod_apk_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/unbreaking_3_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/70925669225.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/28501159073.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/57120145409.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/93394497446.pdf
    • https://cdn.shopify.com/s/files/1/0436/2190/8640/files/93139211202.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/larson_algebra_2_workbook.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_off00005ec5.bin
0ce4a112e5c07d12153e3a85847ae46339edb2724712ca0c67a5ef83e5da5bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC5 5520 bytes
font_01_sfnt_off000071ba.bin
1187b4db9d8deb42aaeb5569ba361382de88f0749e3adabc72055ff83c835c4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71BA 10256 bytes

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