Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aed2317c404c31e…

MALICIOUS

PDF

40.7 KB Created: 2020-09-17 09:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5096b46278f1bb43c39aa2f4db56d55d SHA-1: 5f679f756323aef826b0cdf83d4ccbd5718f12bb SHA-256: 4aed2317c404c31eab4d46d4754dc77b6cf4003d224cff470d7619aec92f93b5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains references to these URLs. This indicates a likely attempt to redirect the user to malicious sites for phishing or malware delivery. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF.

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.club/wix?keyword=t7+power+max
    • http://files.gopalkhanal.com/uploads/1/3/1/3/131383754/tedexilusamuxev_jadosawil.pdf
    • http://bemijagoz.speededocs.com/uploads/1/3/1/4/131408432/945f59a106c.pdf
    • http://vafiku.bayareatutoringsummit.com/uploads/1/3/1/0/131070420/de1996b6d.pdf
    • http://rumida.aliconway.co.uk/uploads/1/3/1/6/131606289/zorerurimotud_jarumag.pdf
    • http://files.talkincorporated.com/uploads/1/3/1/3/131384635/basalefufukufom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87195604050.pdf
    • https://508baa65-62e3-46d8-a471-0e4db13b83e1.filesusr.com/ugd/5dc3ca_c891f59fd5494fe9b2635074ed2b1872.pdf?index=true
    • https://b15408c5-72a6-4dbd-a645-fffcd57df6b5.filesusr.com/ugd/8c0e65_bba401b59a5d471aa9fbe4f1be5c530d.pdf?index=true
    • https://7d42be1d-78d8-4109-b683-7afc70b67f38.filesusr.com/ugd/badafb_624bab01fc9d4593b893bbcd26def57b.pdf?index=true
    • https://7941122a-40cf-4bd7-8f6c-2833f8e0b80a.filesusr.com/ugd/ac1638_a23562f76609412f8ffe299b6386d582.pdf?index=true
    • https://cef13f89-e830-46e2-8866-063af77db86c.filesusr.com/ugd/64e449_a63f840ee8d3413d9f16e96b5958b88d.pdf?index=true
    • 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_off00006348.bin
9d55d6482f07da3d85bb819ede6a994d70392133db9ab84e911ef69ad4144df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 4944 bytes
font_01_sfnt_off0000741b.bin
6ae5257ffc311301c08b8ea690182615b70a5c9cc30ed5b1b344f40b9fa023d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 10224 bytes

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