Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6da8fe14d109417…

MALICIOUS

PDF

43.6 KB Created: 2020-07-24 09:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 940c6e60b807f2978559eaa238efc9d3 SHA-1: 6855d4c5b6a18659fa89951c3f4c157149ea8547 SHA-256: b6da8fe14d109417851ef80b7400d344439130065c1797edc6c77445b119c20b
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify-hosted PDFs. The document body is heavily obfuscated and unreadable, but the presence of the malicious redirector strongly suggests a phishing or scam attempt. No scripts were extracted from this sample.

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/wb?keyword=pr%C3%A1ctica%20cl%C3%ADnica%20en%20gastroenterolog%C3%ADa%20y%20hepatolog%C3%ADa%20pdf
    • http://files.eosfp.com/uploads/1/3/2/6/132696018/2500595.pdf
    • http://files.hesswebber.com/uploads/1/3/0/8/130814601/xoxikoxukiti-xokesikopotak-pulejexurinozaj.pdf
    • http://files.somesugarwithspice.com/uploads/1/3/1/4/131453990/jidegotaxubegot.pdf
    • http://files.diegelrabbitry.com/uploads/1/3/2/3/132303163/6389eee500f.pdf
    • http://files.mectacprinstructor.com/uploads/1/3/1/4/131437740/2f469132278.pdf
    • http://files.somesugarwithspice.com/uploads/1/3/1/4/131453990/jidegotaxubego
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/2655787223.pdf
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/wazadalidufot.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/mowiwozaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/xuxilogegalapazizozolura.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/vipat.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/pegedibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/33434736443.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/kojuvatafawavov.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6854/files/dutujoxakokemesevubakewa.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_off000069c9.bin
dddd456db8ee8a1d8bc38da266f747ff38c1c3baedf6350a89c09b36ffc38dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C9 5596 bytes
font_01_sfnt_off00007c30.bin
f8cdb9221235b0d04aea4a0075aa3d89f0ce8f1b7238728e811e2f0b5c7adfa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C30 10172 bytes

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