Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd48ff093ef4eb3a…

MALICIOUS

PDF

84.1 KB Created: 2020-07-31 09:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 650707f8ca68776f4c601c3a8efa8bf7 SHA-1: 219ca3c8393aa2ae422becea0c998a6614584f34 SHA-256: dd48ff093ef4eb3acec95c94bb7ee461cf5c3aa09cfc8c350f0da5a29376bcbc
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru). This indicates a link farm strategy, commonly used to obscure the final malicious destination or to distribute malware. 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=functions+of+wto+pdf
    • http://files.peterschooltasakou.com/uploads/1/3/0/8/130874435/fumefiruvepurak.pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://files.vcjcostumes.com/uploads/1/3/1/0/131070146/6891419.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/paluno.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/kuwomeda.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/jubarunufomajawipenoxunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/kukemisupuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7899/9446/files/vixudekiregakiropas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/didereku.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/lexokimoruniwegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/73737441276.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/98025975840.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/zunudizuxemikojolanosinal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/56434057160.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/pebiwikajituf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/jiximenagisim.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_off00010f3f.bin
d3c8f8b04eec4edf0ec584daeb37bace163e01a930596c403670a70dab30facb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3F 4624 bytes
font_01_sfnt_off00011f14.bin
873a54877e2e3f9552936e410913e5851acdee81a1adade72a1da46d70370dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 10604 bytes

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