Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ce33134ab7831e…

MALICIOUS

PDF

54.3 KB Created: 2020-07-30 13:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a10fe614fb1307c968bfd68a0a60ef1 SHA-1: cfb985c08442af98b9e6994126c83397a23578dc SHA-256: d8ce33134ab7831ef2f5d7ee7825e0ac483919fca89e766385c8f659009ab135
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates the document is designed to redirect users to malicious sites. Additionally, a large number of external PDF links were found, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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=introduction+to+structural+geology+and+map+interpretation+pdf
    • http://files.iamcnola.org/uploads/1/3/1/0/131070483/wepafiboj.pdf
    • http://files.goldilocksvalves.com/uploads/1/3/2/7/132741130/9872031.pdf
    • http://files.myartisticdentist.com/uploads/1/3/1/4/131453214/ribane_vasilabofeb_dotowifixusiw_zejezurugo.pdf
    • http://files.thestatt.com/uploads/1/3/0/8/130814754/bevibosidu_wevebomokon_mitaleri.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/99258097584.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/kalewixewojupiwugivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7423/files/61296602568.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/54978289568.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5221/files/rijafaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/86351770923.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/63945230748.pdf
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/togowixekerupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/binope.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/9380528652.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/90143764953.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9029/files/43344761945.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/xezodul.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_off0000933c.bin
7735c49d229c0eed99fa39c820fe977270e55ac033da4bc973ab46e5bb8c1e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933C 5396 bytes
font_01_sfnt_off0000a586.bin
4b61afe1444652442b56f297e511bef5f2c7791e6ab5d2d6dfaf347d097dbdae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA586 11080 bytes

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