Malicious PDF — malware analysis report

Static analysis result for SHA-256 4769745de397acdf…

MALICIOUS

PDF

35.9 KB Created: 2020-08-03 18:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02bd4fadb059c06c5403ac26b88707d5 SHA-1: cef032f35710da705314fd6f511837f4c0129ba5 SHA-256: 4769745de397acdf02f584102e84622fe993ee31b6afaa9d3ad05e36dd822216
150 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.com. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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=schindler+s+list+violin+sheet+music+pdf+free
    • http://files.sjcacademy.com/uploads/1/3/0/8/130814390/1049087.pdf
    • http://files.teachforthebroadestreach.org/uploads/1/3/0/7/130775292/0d8bec5f.pdf
    • http://files.hingham-therapy.com/uploads/1/3/2/6/132681033/tevifavukelo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/miwaranav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tokon.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/zaferegazusuxilabodudiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8673/1681/files/13582968337.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/51995851273.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/fibonupakewukativiva.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/67465536684.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/78870892937.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/1652717932.pdf
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/poe_basalt_flask.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.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_off00004d21.bin
f3ea4a46ca6246914c75d1c9b1e7dac7569bc60e8fb540259d6a9e3c62fa5d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D21 5348 bytes
font_01_sfnt_off00005f32.bin
3ed964dd7761a35bd1fe2b3513976fa0db9f062e2bdbd7a300a67998937965a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F32 10456 bytes

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