Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bd505009b55e72…

MALICIOUS

PDF

42.2 KB Created: 2020-08-02 02:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84645e582283cdb672357b1ec9c31c1f SHA-1: ca12a20a9e71b503a945d74cc3c7df185c3aa72a SHA-256: b5bd505009b55e72f1043018bff2f7e67d07221edf48cdd6f8ad8aebaaf474dc
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, many of which point to external domains, indicating a link farm. One critical heuristic firing confirms that the PDF links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=eileen+wellstone+snopes, which is likely used to redirect users to further malicious content. No scripts were extracted, and the document body is heavily obfuscated.

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=eileen+wellstone+snopes
    • http://files.oneluventertainment.com/uploads/1/3/1/4/131453989/fizokexo.pdf
    • http://files.pcsdccc.org/uploads/1/3/0/8/130874598/zenidep.pdf
    • http://files.pilitconsulting.com/uploads/1/3/1/6/131636806/8d9c76dfbf82.pdf
    • http://files.shophomegirl.com/uploads/1/3/0/9/130969588/kevitit_zusinu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3480/2333/files/genoxomipupowogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/julerugokunedate.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/zasadogetev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/vebitujalominow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/lasuwivujabepodaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/gap_titan_dx.pdf
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/30201821573.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/95035522597.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/21679265444.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57308776079.pdf
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/tilipibir.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/bapubanoladudovuvij.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_off000069dc.bin
0f794ead4943954be936aac4b8e2605bdaf28621a4d00630b9c7ff3e6b018357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DC 4556 bytes
font_01_sfnt_off00007989.bin
c447ef649e5fed527f0a14d56422d2b31ce18403d1e47db08fb9b2118b2337b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7989 10184 bytes

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