Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3957db93fa6d3e…

MALICIOUS

PDF

36.2 KB Created: 2020-08-28 07:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6519cb0eb06599ff1188ddc087ce9fa SHA-1: 67b4dc4191a130aa3cf339e4080a25bf2e5cfc8b SHA-256: 7d3957db93fa6d3e320f82d71bffece3632634cc843bc99ecf2876009b3019dd
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL. The document body, though heavily obfuscated, contains the same malicious URL. This indicates the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing. No scripts were extracted, and the family is unknown.

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.com/pify?keyword=domain+driven+design+eric+evans+pdf+download
    • http://files.spiritofwalloon.com/uploads/1/3/1/4/131452903/5163078.pdf
    • http://files.hillandstump.com/uploads/1/3/1/4/131410736/5362609.pdf
    • http://files.tashtinkennel.com/uploads/1/3/1/3/131397996/tetiduxuban.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/gatedajatekofazer.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/wufikosibon.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/garami.pdf
    • https://cdn.shopify.com/s/files/1/0431/0410/8711/files/porn_mags.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/94306674664.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/xolujewosijirigekol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/zufavulam.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/33543166676.pdf
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/dakule.pdf
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/ibps_clerk_exam_preparation_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/80069997138.pdf
    • https://cdn.shopify.com/s/files/1/0463/0623/0434/files/wurimowugopozakofe.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_off00005161.bin
3944dcf4ed015ea9c1b77fd23b9555483079f719c5db12bea0cf7281ff66d01a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5161 5628 bytes
font_01_sfnt_off00006480.bin
809f155d9ba39169ab5a30ea28d45a143c32cc9ac64b92fccc8f3a0dc4667edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 9176 bytes

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