Malicious PDF — malware analysis report

Static analysis result for SHA-256 948c83d59cf2fd6d…

MALICIOUS

PDF

68.6 KB Created: 2020-08-28 07:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95b09e9ca4d172b88c31e1556f44a100 SHA-1: 4b37e9b509de099b843847bb101e34cd5b1c7813 SHA-256: 948c83d59cf2fd6d97bf12dc408b969371db9d39bd89e9ce1d62ef78d546cd61
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 a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Brian pumper movies' and a URL that aligns with the malicious redirector. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The primary malicious IOC is the redirector URL.

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/pify?keyword=brian+pumper+movies
    • http://tivojaze.thriftbox.org/uploads/1/3/1/0/131070054/551b09388cccc9.pdf
    • http://files.mail.thespiritbutterfly.com/uploads/1/3/0/8/130873927/nusiba-sefibat-zelosolegejuva.pdf
    • http://wadode.sheenamcgrandles.com/uploads/1/3/0/7/130775085/c3c562991fe.pdf
    • http://femex.trailboundberners.com/uploads/1/3/0/8/130874422/7670059.pdf
    • http://files.patchesfamilycreamery.com/uploads/1/3/0/8/130874189/2630716.pdf
    • https://cdn.shopify.com/s/files/1/0444/3645/5591/files/yamaha_yst-_sw215.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/bitcoin_sv_address_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/64034872689.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6175/files/91354416993.pdf
    • https://cdn.shopify.com/s/files/1/0432/8957/5588/files/mepagalukibupive.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/86270834037.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/dotatuweri.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_off0000c3b0.bin
88d7cb790e5abad6fe018a4c6c50f9d555d7dce240a0af5d97b9efecc2dfee23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B0 5044 bytes
font_01_sfnt_off0000d4bc.bin
1fd64698652735d730d5c1abdf27ec1625da29c93fb5445599d03d722514d764		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BC 16124 bytes

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