Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a748ceb29cb2b6…

MALICIOUS

PDF

37.0 KB Created: 2020-08-30 19:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc88360ec6cf3c7186ffe2dca65e3d8a SHA-1: 80d649c4f6274ec445cd6f7d140a65d25d8363ff SHA-256: d4a748ceb29cb2b63edb60cb29c052039d268d234768ba220f2d4381ac79aeea
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, specifically for containing a large number of external links and a redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=map+of+baldurs+gate', which is also listed as a malicious redirector. The presence of numerous links to external PDFs hosted on various domains suggests an attempt to distribute malicious content or engage in SEO poisoning.

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.cc/wix?keyword=map+of+baldurs+gate
    • https://static.usrfiles.com/ugd/b8c837_f0e16b08bc094be0a1b304002db0b11e.pdf
    • https://static.usrfiles.com/ugd/19103d_b1f63b3324054948963c6585dee5a6e1.pdf
    • https://static.usrfiles.com/ugd/1d64af_14921272f2dc47a4ac4fb89387b4c5c5.pdf
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/sozobabopefafivafeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/8357/0078/files/24702333452.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/jenidugejuluxivigutifape.pdf
    • https://cdn.shopify.com/s/files/1/0457/8636/6118/files/bursa_malaysia_sustainability_reporting_framework.pdf
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/60743739373.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/72753954345.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2357/files/understanding_by_design_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/29767834446.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/24702720221.pdf
    • https://cdn.shopify.com/s/files/1/0433/5684/8282/files/75308609194.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_off00005169.bin
df341bfbdce59810d1f5b7f1d51732d04484c0c65ec6cd5f3f0b4131b84d00da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5169 5352 bytes
font_01_sfnt_off000063a8.bin
94f09a6b66200379567a3c1a5f1ffd662e3191a787491d15f2bfce9d7e6f0665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 10508 bytes

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