Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe68aa4e12fc97a…

MALICIOUS

PDF

48.2 KB Created: 2020-07-30 05:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 861cd892d24eb41f19550c1fd1025a8d SHA-1: f6b658861f3444efa0fc0bc403fe1f515b44b355 SHA-256: bfe68aa4e12fc97a7f08b06e019d66659fb33d9405e7146f12433ad8e9e3f67c
120 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 'ttraff.ru'. This indicates an attempt to lure the user to a potentially harmful site. Additionally, a PDF link farm heuristic suggests the document is part of a larger effort to distribute malicious links. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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=esclerosis+multiple+tratamiento+fisioterapeutico+pdf
    • http://files.topnotchdjservice.com/uploads/1/3/1/8/131872015/rigudopulilare.pdf
    • http://files.nextlevelgamex.com/uploads/1/3/0/7/130776735/7866785.pdf
    • http://files.pillywigginsgarden.com/uploads/1/3/0/8/130814258/2604146.pdf
    • http://files.riversidecoc.net/uploads/1/3/2/6/132681954/bovuzalonoduki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/36509135748.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/dalomonesi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0851/3432/files/64419051428.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/rotukiladadaxebu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/25729399106.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/kiral.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/93652773280.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/33084852306.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/90219705302.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/91117727484.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5804/files/86120549627.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7099/files/womovafodavebalalenes.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/
    • https://cdn.shopify.com/s/files/1/0433/2

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000802d.bin
d27b5255fccbfe5d722bef8ebc0a5aa0c962897a0d078eb4255bf80090a1960e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 5140 bytes
font_01_sfnt_off00009184.bin
6851811c538b9291b18c28e9bc3e0f0a6a91b0f5e254ad2cb24b781e39bce5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9184 9892 bytes

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