Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7b9a6593fdeba4…

MALICIOUS

PDF

40.5 KB Created: 2020-08-26 15:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39a2fe06445e6215f90a516b1d421ac0 SHA-1: 1aaffdac458b2ebdcbb1d3aa1140e911035c67f8 SHA-256: 8c7b9a6593fdeba45c3309abbab263f0ab37111f83a83b291b65dbba1701773c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=alien+aisha+vending+machine'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking filename, suggesting a lure to download a potentially malicious file. The 'SE_URGENCY_LURE' heuristic further supports the social engineering aspect of this attack.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=alien+aisha+vending+machine
    • http://files.phil-com.com/uploads/1/3/2/6/132682124/nuwubivi.pdf
    • http://files.pamelabramble.com/uploads/1/3/1/4/131437005/f9aca830fda68.pdf
    • https://cdn.shopify.com/s/files/1/0461/8479/2217/files/arduino_bluetooth_controller_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/jegipago.pdf
    • https://cdn.shopify.com/s/files/1/0432/4782/9156/files/report_for_work_l_g.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/matikegikisenezonus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/90726258249.pdf
    • https://cdn.shopify.com/s/files/1/0457/5635/0628/files/nikafesajurufaxogafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/nebomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/mikurasugevog.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/77296115879.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/vosuwiru.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_off0000607b.bin
90b0616683e42234ae893aa6850b1586490ee99b52087e49f5c7a951d5cca51c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607B 5304 bytes
font_01_sfnt_off0000725d.bin
fa5a0b7dfe6bd54f8267ce5c0ad3fccc97c5e6ff58ca00dc3d3c4be7a471fb41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 10292 bytes

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