Malicious PDF — malware analysis report

Static analysis result for SHA-256 f678c9daf52ea5d4…

MALICIOUS

PDF

36.8 KB Created: 2020-08-03 10:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 862e8e47f272bbe4488126746992bdad SHA-1: c298721531dafd25aec84031eb6fd9df6d517ffc SHA-256: f678c9daf52ea5d47853f8025a5e62fbdacda442f24ee5ad5d31d50f1df452e6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-Override T1059.001 PowerShell

The PDF contains a large number of embedded links, identified as a link farm, pointing to a malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=ls+dyna+manual, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on benign-looking domains, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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=ls+dyna+manual
    • http://files.ijcmsr.com/uploads/1/3/0/7/130739212/vatipe.pdf
    • http://files.robicellis.com/uploads/1/3/1/8/131857717/ab03d8c0adf.pdf
    • http://files.innerevolutionproducts.com/uploads/1/3/1/3/131379361/8056337.pdf
    • http://files.brianpatrickgodfrey.com/uploads/1/3/0/7/130775813/d6fefd8ba138.pdf
    • http://files.addictionmadison.com/uploads/1/3/1/4/131453022/sikofit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/zekuxevetukufikuwerutuguf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3166/files/xogebonupasexavotutekuzus.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/35251280798.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/vetugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2556/2791/files/29951753841.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/96976153000.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1890/files/47359075383.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/pigok.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/41265782798.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/xagufile.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/zazed.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/10773884426.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/93076305771.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_off000051ab.bin
a74fe56b2b7eaa59d425d04e901d39bb56a1d015035d4d51c512e25256e32e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51AB 4920 bytes
font_01_sfnt_off00006262.bin
7400707f7a34037accb16c3bf4d3e7f6c85615e1d1acbc10123353ecca1f046e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 10192 bytes

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