Malicious PDF — malware analysis report

Static analysis result for SHA-256 af54ffb8c34b8b3d…

MALICIOUS

PDF

37.8 KB Created: 2020-08-23 05:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a325e9d6fc14bec1f5daf9a547a6e3 SHA-1: 5ec09e873c151fbb2dfabb9eb25d8c7c4c640867 SHA-256: af54ffb8c34b8b3d887e179df208a0c38ffeb6d299991130c3749fffdedf0a14
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of outbound links, many of which are likely part of a link farm. The ML classifier also flagged this PDF with high confidence. The embedded URLs, particularly the one pointing to 'ttraff.ru', are suspicious and likely part of a phishing or redirection scheme.

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=medical+biochemistry+books+pdf+free
    • http://rolezoded.technologypackaging.com/uploads/1/3/2/7/132740405/8cf5df5f.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/niwitofutifuwosogazusudum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/71882334677.pdf
    • https://cdn.shopify.com/s/files/1/0452/5198/5565/files/comparative_adverbs_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/gosenopojabaruzasar.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/volinigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/doxofa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/nagoloduwewowofurubakuvu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/87494661013.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3215/files/nipowikulofezikanumar.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/56585433890.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/achieving_excellence_through_customer_service.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.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_off00005657.bin
20d308d10e81c259dc1d248460e821ad5b67f1427dff078c2f4cc80b0a9eaeba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5657 5704 bytes
font_01_sfnt_off00006995.bin
f70d666900b419dfcc936af1c1b4fcfa6a0c16e8628d9d19a735ce160a8a3c9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 9636 bytes

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