Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f0a864af5616a3…

MALICIOUS

PDF

44.6 KB Created: 2020-08-19 09:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07013b6deade60872546a16d61c0606e SHA-1: d57091e8d82b6208f3fd3795cb55d6175d162093 SHA-256: a6f0a864af5616a366a239a344823687867ea191f0949bf7d42cd97f973d9298
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm or redirection tactic. The primary malicious URL identified is ttraff.cc, which is used in conjunction with a keyword parameter. The document body contains garbled text but also includes the malicious URL and several Shopify-hosted PDF links, some of which are likely part of the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=ksp+cpc+key+answer
    • http://levaxoza.tactmealcenter.org/uploads/1/3/0/8/130814328/nuwajaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2347/3560/files/83107861454.pdf
    • https://cdn.shopify.com/s/files/1/0439/2756/8552/files/viponoxewinawepa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4282/4611/files/xutedoxebilomamop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0872/8993/files/free_lettering_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/cursive_alphabet_writing_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/getalobusitipiwazajeloxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/vejobisenixarena.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/12967198382.pdf
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/and_so_but_because_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/mac_kill_process_on_port.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_off0000728c.bin
e4f7de3d21384e8ec43685405f250eafda9a87b8fa6b0911c0e3d4035e5a56a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728C 5124 bytes
font_01_sfnt_off0000841c.bin
68e7d01edd709b06220aaa4a8ae39008ab27d3d91d4b44b34b816d0c2ddafc3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841C 9964 bytes

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