Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a50d1282defdfa…

MALICIOUS

PDF

48.5 KB Created: 2020-07-27 21:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b0a960498ac98c5a9c8742a5791b8a2 SHA-1: 00d10858aab602bc85a00e5f4106441677cd5b6c SHA-256: a7a50d1282defdfad6a8d7375f1cd17b5fb02b2a042ab9925b31a5521bb9cde8
120 Risk Score

Malware Insights

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

The PDF file contains a link disguised as an admission list, which redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a spam or phishing campaign.

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=oou+admission+list+2019%252F+20+pdf
    • http://files.medicinalrootsmagazine.com/uploads/1/3/2/6/132695339/726c76.pdf
    • http://files.solutionstailored.com/uploads/1/3/1/4/131453712/2607489.pdf
    • http://files.widuskorea.com/uploads/1/3/1/8/131872055/7564274.pdf
    • http://files.dsnatural.com/uploads/1/3/1/4/131408170/rojovupajagigogis.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/zixamasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/vulirinoxizadaranitaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/19859679841.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/roted.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/19760365732.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/gejimolasiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/70093200564.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/2420522867.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/dubuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/34919679640.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/sijavatev.pdf
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/vexevavide.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/43278079978.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/
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075bc.bin
77c9b0c20757b02f3fe2f57c40ba49cf9d4c287a2fbb47ba1878859f08bdadef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 5400 bytes
font_01_sfnt_off00008805.bin
eb21032e293a633ca8f6b0046d13a6e40be7e062a4aadc6f78abd43e8cfd54c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8805 14364 bytes

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