Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce6a0d0427a62d1…

MALICIOUS

PDF

44.6 KB Created: 2020-07-29 04:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b70322862ba43fe9ae865f37a4a2ae61 SHA-1: d01f82074cbb0edfcdae5e612e38603889b2425d SHA-256: 9ce6a0d0427a62d16a2fde781037a47bf072c3e37f04d9e28cdccbfd0440be83
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm designed to attract traffic. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to further malicious content.

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.ru/pify?keyword=business+report+writing+skills
    • http://files.burmantoftscommunityprojects.org/uploads/1/3/2/6/132681928/7019272.pdf
    • http://files.mitchellhabitat.org/uploads/1/3/1/4/131454549/kefapivo_finegenar_jinaj.pdf
    • http://files.stacigriesbach.com/uploads/1/3/0/9/130969097/2042345.pdf
    • http://files.newseasonsafh.org/uploads/1/3/0/7/130738823/mawikutus.pdf
    • http://files.stacigriesbach.com/uploads/1/3/0/9
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/84664471240.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/mexavamome.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/13141560664.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/mawupibogidixixorin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/rijibopituwevopuxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/pakuxoramixeret.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/33143617572.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/10447185319.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/nukifup.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/dasamisesira.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/84402011981.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_off000072df.bin
ab8a3001c0ec15a8610b12eb4067dc1e55ddb9afd8876e02ecd32f119c61065f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DF 4864 bytes
font_01_sfnt_off0000838b.bin
272ce364e6f9dd84cb0d7d12d7bbd54cc83cfb6daa87e9b452cb122cc9c2011f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838B 9920 bytes

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