Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2743dd1016a1d55…

MALICIOUS

PDF

36.1 KB Created: 2020-08-28 20:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae1b2b591f0aa0e7d78bc8213e612f39 SHA-1: 0f2d2ebfaaf26bff6f890f481bd52a443d179ddb SHA-256: a2743dd1016a1d55f66badb056350b8c484ae56466a4700e85d79563c02be02d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, a common tactic for SEO poisoning and phishing campaigns. One of the embedded URLs, 'https://ttraff.com/wix?keyword=link+video+porno', is identified as a malicious redirector. The presence of numerous links, including the malicious one, suggests an attempt to lure users to malicious websites. The ML classifier also flagged this PDF with high confidence.

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.com/wix?keyword=link+video+porno
    • https://static.usrfiles.com/ugd/b8c837_3635a1af29d649b2bb88033299c6ccbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_70b9141eab82439f9b62e8d9d77b190e.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e2403becef4676ae52a0c0f743d93c.pdf
    • https://static.usrfiles.com/ugd/b8c837_6836a9617dd74fd388871391ef6bd062.pdf
    • https://static.usrfiles.com/ugd/b8c837_086d752e20924578be7c702e81248317.pdf
    • https://static.usrfiles.com/ugd/b8c837_db400fc316c843138e2e4d2174a9585e.pdf
    • https://static.usrfiles.com/ugd/b8c837_538721c2a6c542a3807f4fcdeba1b002.pdf
    • https://static.usrfiles.com/ugd/b8c837_5714bae28ead4cc998467ce501fe75ef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/lasevef.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/calcaneal_spur_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0432/7640/2854/files/53800035419.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4663/files/99884351254.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4071/files/bumonigidukaxabeguvale.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_off0000512b.bin
1b44fe5f44d2d85b7c8dcc836a393f8003186765d69098c462e4f8e4b6276440		 pdf-font-stream PDF embedded font (sfnt) at offset 0x512B 4596 bytes
font_01_sfnt_off000060e5.bin
7a4e3283e0b9df1a842dc0e82d6a1154848fcc04765530875d7d7a9bc4b1b861		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 10408 bytes

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