Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f214402aeed7ce…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 23:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3abc8085bcb4a912843b3e52a25fb9ae SHA-1: c4d6d3d8ee1698167d4126f65cf32aee47d78c86 SHA-256: e0f214402aeed7ce18c60b7f71da099b59bfd99ed8e2e37756a41bfed4cd1e8a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=christmas+maths+worksheets+ks2+printable, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The primary intent appears to be redirecting users 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.cc/pify?keyword=christmas+maths+worksheets+ks2+printable
    • http://reroroduf.checkmatebook.com/uploads/1/3/1/4/131406082/kovilekerijajuzori.pdf
    • http://files.artbyhelmi.com/uploads/1/3/0/9/130969426/gofadoro_vojalimubewoto.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/amazfit_bip_english_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/66449074198.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/86968084865.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/wifido.pdf
    • https://cdn.shopify.com/s/files/1/0435/1488/8360/files/zujesipamuxudewe.pdf
    • https://cdn.shopify.com/s/files/1/0447/9841/0918/files/australian_standard_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1509/files/antennas_and_wave_propagation_fourth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/wenemazedu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/55710426197.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_off000066b0.bin
e7aea976fed6406e94dd8db0169dd693e1171bcc28a8bac9291dfdac666cbe95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B0 5392 bytes
font_01_sfnt_off000078ef.bin
9e57eb9c6d3812b6ae416b4c3024e557b43e0141e6f699f47d8ccd1777297570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 11932 bytes

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