Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff692f34336416b…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 19:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4298d6715342de9c5cdaf84072a6efa SHA-1: a3f299977fe5a7597708a3c892d84c2a4f3706a8 SHA-256: 3ff692f34336416ba21ecef3143e9cf3b4d11ad61405f4acbba5306b0cf61ea8
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a keyword related to 'Astroneer terrain analyser'. This suggests a phishing or scam attempt to redirect the user to malicious content. The PDF also contains a large number of external links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse. No scripts were extracted from this sample.

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/wix?keyword=astroneer+terrain+analyser
    • https://static.usrfiles.com/ugd/b8c837_04bdddd48700441bb53d7274cfbef8dd.pdf
    • https://static.usrfiles.com/ugd/32acb1_dac39d5b95bd4b4ebea24bd1e5bae36a.pdf
    • https://static.usrfiles.com/ugd/b8c837_93ba3da61f764956aa760ba5357b868c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6f03430e028479785e094f60b1fd64e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c0483a44233446fa93c17cea1211680.pdf
    • https://cdn.shopify.com/s/files/1/0433/8086/7235/files/separation_techniques_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0468/1279/0938/files/xemasavatijofunix.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5831/files/59500702314.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/40650469061.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3411/files/10584916875.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/neumonia_unam.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/as_aware_se.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/84930802927.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2322/files/1211387622.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_off000061ef.bin
e60e0c05988dddf06f299eaef87c8eb14cfe3d70cf5855ce2594f40a36f5a32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 4768 bytes
font_01_sfnt_off00007234.bin
ff9bcdfa5a7eb39b91f4898726a2cc04445f6c66af967cefb11858d8fb7c9e35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7234 10360 bytes

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