Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ca1677a1036c66…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 15:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5cc1952c3c95735ebc4c948d5b3e132 SHA-1: 423ebe78502d810e3b62969c413955e0f40e180d SHA-256: 58ca1677a1036c66031a3e6430d560a306dcd228889261507293f932519bb936
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=red+formal+dresses+long'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. The presence of a large number of external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact lure.

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/wix?keyword=red+formal+dresses+long
    • https://static.usrfiles.com/ugd/b8c837_f86210dab46140d2aa205a30258b3991.pdf
    • https://static.usrfiles.com/ugd/b8c837_577d03c2bc6a44589703ca04f8528cd5.pdf
    • https://static.usrfiles.com/ugd/22bf55_aedb03d797be4673a5ee616100d7cffd.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/filaderipulasofan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/lopisixidominiwapozex.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/63874349178.pdf
    • https://cdn.shopify.com/s/files/1/0433/8221/0725/files/gatomugegamasifegozasis.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_ebe6fe12867d4e74b938f1dc9ec06af6.pdf
    • https://static.usrfiles.com/ugd/6cfc61_e18fd5b64caf48bdb756a9f2bbfb9596.pdf
    • https://static.usrfiles.com/ugd/ab059d_a480fdcfe3d64db7b14dc067ee80a516.pdf
    • https://static.usrfiles.com/ugd/3e87bf_630b9989384c4492baec9b433fa59743.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_off00006a6f.bin
25720bb518a903e2a25fbc536b596a9e98eed990993329f0c414dd096676e7d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6F 5236 bytes
font_01_sfnt_off00007c27.bin
acfd570aa6f6bb7c630b1e393309f75b54ddcd2021a74b11034f63b79016af52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C27 10564 bytes

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