Malicious PDF — malware analysis report

Static analysis result for SHA-256 36308ae72c1dc7a6…

MALICIOUS

PDF

44.4 KB Created: 2020-08-10 15:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adc712ab7741a1116ede873dbc3918d5 SHA-1: 1c23b33d0324bc54a6282dac8db234df6cf15980 SHA-256: 36308ae72c1dc7a6c725707e406aa84e8c9001efe5305269304d915385e852d9
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bronchitis+akut+pdf', which is flagged as malicious. This suggests the PDF is part of a link farm or SEO manipulation scheme designed to drive traffic to malicious infrastructure.

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/pify?keyword=bronchitis+akut+pdf
    • http://files.synergyies.com/uploads/1/3/1/0/131070581/dc6106467d0.pdf
    • http://fanuwita.midwivesadvantage.com/uploads/1/3/0/8/130874254/834647d16.pdf
    • http://siwuniv.tristynbustamante.com/uploads/1/3/1/0/131070152/42bf1f9.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/pujusamid.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1448/files/40614858710.pdf
    • https://cdn.shopify.com/s/files/1/0435/9674/2815/files/34147385234.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3599/files/difenojataxegofavigugor.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/97707509767.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4021/0072/files/toxireberozotubixijonor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/xujedarepumizinesupavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9688/3868/files/calculus_a_complete_course_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/2586/5636/files/borewusifarolodosiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/68784054295.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_off00006dcd.bin
7d68b8a5048f06722a0375bb080eacbb8f91d95fc3cb811a7dddb55b98e54ef1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 5324 bytes
font_01_sfnt_off00007fdc.bin
230bda9410189752f8048347644f2aa2fdc12f41e89e13f2b4659289619864c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDC 11000 bytes

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