Malicious PDF — malware analysis report

Static analysis result for SHA-256 9290bb595b1565fc…

MALICIOUS

PDF

39.1 KB Created: 2020-07-31 23:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1e4a2f5c8247d5e493ce00f1e0ae207 SHA-1: a001b018d685f579db3eea6a7e91aa9c592b9a77 SHA-256: 9290bb595b1565fc90f2af3e9de0e0800217f5d16b6c2b4f036c695201854372
150 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for containing malicious redirector links, specifically pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the primary malicious URL, suggesting the document's purpose is to lure users to malicious sites.

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=nautical+star+meaning
    • http://files.mandscigars.com/uploads/1/3/0/7/130776714/aede84.pdf
    • http://files.collieinspections.com/uploads/1/3/2/7/132740852/c312b8.pdf
    • http://files.erinmerrill.studio/uploads/1/3/1/3/131383514/89887.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/3650245548.pdf
    • https://cdn.shopify.com/s/files/1/0435/8186/6143/files/49347037837.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/88290701914.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/92294660655.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/mugetibi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/goziwazadibifefobif.pdf
    • https://cdn.shopify.com/s/files/1/0434/6377/0274/files/98323168071.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/87659391509.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5790/files/xuzugomofe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/20120159773.pdf
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/tutile.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/rizilazejak.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/jenaralorawigebavajeselu.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_off00005d44.bin
ad5d04b0ffedb496c2100c0d4878a8b39458e75b7f28cdad0ed5e8e3fd76a3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 5088 bytes
font_01_sfnt_off00006e7b.bin
32f3b0078007ff4502952261ea0e94e3f433bed17fc59d87199388b8e365925a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7B 9728 bytes

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