Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7c09415f5ac1fe…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 02:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ab04cadd83315338f32e363cdd96c5 SHA-1: 6c75c8b73fda56f47c9182fde0b62c7f1bbe1068 SHA-256: bf7c09415f5ac1fee2314f216cca4a8ebab5fe70f284ce1206e66f6d50211bc6
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify domains, suggesting a link farm or redirection strategy. The primary intent appears to be luring the user to a malicious site via these embedded links.

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.ru/pify?keyword=traducir+ingles+espa%25C3%25B1ol+archivo+pdf
    • http://files.achickandherbump.com/uploads/1/3/1/4/131411539/rukaniwasorezapeli.pdf
    • http://files.ct-200.com/uploads/1/3/0/8/130873947/7531796.pdf
    • http://files.wsochicago.com/uploads/1/3/2/7/132740659/linasuripemur.pdf
    • http://files.ruggedmountaintaxidermy.com/uploads/1/3/2/6/132696154/kinumarezoda.pdf
    • http://mateb.olivetgroup.com/uploads/1/3/1/4/131411896/tasapadaxi_misivoxapan.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/wutegijenolifuvigifipunad.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/amazon_writing_sample.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/lixanovirotuwovagoxod.pdf
    • https://cdn.shopify.com/s/files/1/0438/1615/7344/files/filoboworikujidazog.pdf
    • https://cdn.shopify.com/s/files/1/0440/7925/1608/files/16121117192.pdf
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/kofexugegikaruluga.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6260/files/68882293640.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/80598154569.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/11863903748.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7625/files/moxemabuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/files/tcp_ip_sockets_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/kozamemofimi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/vikurur.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_off00006587.bin
a85ab27bce0550836964a55d674ef8da39c81b15ef3990e267f4435a21d9d57f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 5640 bytes
font_01_sfnt_off00007873.bin
ed5fdeed7d9dfcad2b6aff81d5c9c65a26461ca23931031cc46a2d55e5c313f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7873 10748 bytes

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