Malicious PDF — malware analysis report

Static analysis result for SHA-256 f438198a838a4197…

MALICIOUS

PDF

38.4 KB Created: 2020-08-21 08:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 539b8351669ae8279f306336f18ae2b7 SHA-1: a6301ee47cc9c384b34c0dfcf66ae40d1cc99140 SHA-256: f438198a838a4197b50ec1fa11a95040ccaad16e1bb4e23d526b8393c9181245
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link https://ttraff.cc/pify?keyword=c%252F+al+format+decimal is part of known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests the document is designed to host numerous external links, likely for SEO manipulation or to distribute further malicious content. The document body contains garbled text and the URL that triggered the redirector, reinforcing the malicious intent.

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.cc/pify?keyword=c%252F+al+format+decimal
    • http://files.aampmuseum.org/uploads/1/3/1/8/131871597/2552e.pdf
    • http://files.englishmountainlabradors.com/uploads/1/3/1/6/131606392/ritabuwi.pdf
    • http://files.maisonsouthernfrance.com/uploads/1/3/0/8/130874575/30855f0ab6447e5.pdf
    • http://mefegevow.insidesportsclinic.com/uploads/1/3/1/3/131380397/6873435.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/wizuvinigefatav.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1425/files/rirawujapine.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunizededalusabunis.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/momiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/6920/1832/files/38317474288.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/30777144363.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/25500953050.pdf
    • https://cdn.shopify.com/s/files/1/0434/2244/9820/files/jixud.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_off000051df.bin
1467fe92a8a1230aa6c0661140b7efd2b8d861bc0eceefb9a854039a78f5e224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DF 4928 bytes
font_01_sfnt_off00006291.bin
9672013fd8609d1c02865b5c29082a59cd6e6b37e365408f70d342d759506367		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 13544 bytes

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