Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b4ba2ed045aebb…

MALICIOUS

PDF

40.7 KB Created: 2020-09-17 14:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55349e8987512bfa4fe8f71fd9e8630a SHA-1: 2fafafb852c65e0e1e4e5076951b8a3fb4446f07 SHA-256: f5b4ba2ed045aebbdae6e7e7bc6e40f83c663a327324af6caa1e664ae513617e
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=king+size+catalog+request'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure for a 'king size catalog request'. The primary attack pattern involves tricking the user into clicking the malicious link.

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.club/wix?keyword=king+size+catalog+request
    • http://wijed.preparepublications.org/uploads/1/3/0/9/130969723/3326428.pdf
    • http://lumig.in2out.org.uk/uploads/1/3/0/8/130813786/kopixemejasipunavij.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/rifaxavosiresugakuxob.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/livingston_county_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/tupabupotut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/morfologia_de_las_bacterias_fitopatogenas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/kekabat.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/83573398582.pdf
    • https://13bd497f-546f-4215-ab07-0f97fb77c593.filesusr.com/ugd/f390e7_4bdc85b8bb0e4911b0db00520ce4e036.pdf?index=true
    • https://2a82e8b1-e190-4e93-902e-816482bd01c4.filesusr.com/ugd/771ea4_e87ec67107e346a9b0dbcc58e70d1d20.pdf?index=true
    • 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/
    • https://13bd497f-546f-4215-ab07-0f97fb77c593.filesusr.com/ugd/f390e7_4bdc85b8bb0e4911b0db

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006065.bin
f80cf86409908c8f2ba97fba33013defcbf1d5ac458d27a123ba70fc354f9899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 5112 bytes
font_01_sfnt_off000071f0.bin
262dae76fd61b71f3d059186697c496a52f138729df47e9cf6f2b99886ffa647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F0 10592 bytes

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