Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b592334e03f761…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 08:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55124fee9532145d14c315fb56266b4c SHA-1: 16e5e1285bab62b09f5c60f3dc160101fef5b68b SHA-256: b1b592334e03f761cc889b956cc157e861b9d3d7fcc24764578d7ee74166752b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'World's hardest game 4' and the malicious URL. This suggests a social engineering lure to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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=world%2527+s+hardest+game+4
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd536a2a81474067928e9b4219d4662d.pdf
    • https://static.usrfiles.com/ugd/df4650_83c5593db1c6418f80dbc3ff665819c0.pdf
    • https://static.usrfiles.com/ugd/23e9be_da7189356b894a739abf618d486fa6d6.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5030/files/el_lazarillo_de_tormes_cervantes_virtual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/lipetiga.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d79f086051b493cac22bfa2ce73769c.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_52ec05d1da5042c7857b09c72cf3965f.pdf
    • https://static.usrfiles.com/ugd/c8a981_82f3393f8f284a70b4a8b8ac3cdec317.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f8215a9ea514b359c48464451532b64.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/10607772736.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/49006105737.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8229/files/alzheimer_unam.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_off0000684d.bin
db846bc2836871e1b97b01b4970de3a8ba1254b1d6544424454789d2072c9b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684D 5376 bytes
font_01_sfnt_off00007a8e.bin
b0d6ef4b9ada6c9cdab9c7c18ad9d59cad7c8997ee1afb8b4b4cdcbfbdbf6820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8E 10248 bytes

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