Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e46e81294eea09…

MALICIOUS

PDF

43.1 KB Created: 2020-07-28 18:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 413e4ec6f939ae41e23120b1277f92e2 SHA-1: 6ebdc2496788dbc6d543e77a2fd72db148d8664a SHA-256: a4e46e81294eea09ea523f687fa986c0388ad2f5aded3a3c5b1896ac9d6f052f
128 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, specifically linking to known malicious redirector infrastructure and employing a link farm strategy. The presence of a 'download button' heuristic further supports the lure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=mann+whitney+u+test+excel+template, which is likely used to redirect users to a further malicious destination.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mann+whitney+u+test+excel+template
    • http://files.mountainbikegreenville.com/uploads/1/3/0/7/130775366/siwibe-gixamasuxeno.pdf
    • http://files.post111stl.com/uploads/1/3/1/6/131606193/fofulija_puwur.pdf
    • http://files.ideaventionsacademy.org/uploads/1/3/1/4/131411281/7329677.pdf
    • https://cdn.shopify.com/s/files/1/0433/5520/9879/files/piveteniwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/zudisobotexili.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/75388652185.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/sezosivadelabubarodusura.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5330/files/56929647501.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/14284862211.pdf
    • https://cdn.shopify.com/s/files/1/0436/8901/7497/files/pobonikogun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/dapiwusigenixumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/85378648240.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_off00006b89.bin
8768cc9462dd08b8b3c3a84adc30c1475e2b99edff18ca2321682716c059f6d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 5116 bytes
font_01_sfnt_off00007ce1.bin
1d1648bb7da722377fa3786463165c7fb614d3092639bc57671aae5f487a48d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE1 10080 bytes

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