Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c078aaf2113283f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-21 13:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5990f061f106d38e689153560de14b6 SHA-1: 1610a9205881e64ca67c64bdc28b4ae252e4b5d3 SHA-256: 7c078aaf2113283fabb522977dfc502ff4a5df0f41e81621cf6a0ae532dd2acc
150 Risk Score

Malware Insights

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

The PDF contains a deceptive title and body text referencing a 'Xero chart of accounts template' to entice users to click embedded links. One critical heuristic indicates a malicious redirector link, and another points to a large PDF link farm, suggesting a phishing or scam attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=xero+chart+of+accounts+template, which is used to redirect users to further malicious content.

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.cc/pify?keyword=xero+chart+of+accounts+template
    • http://files.dogsltdtraining.com/uploads/1/3/1/3/131383607/67589f51.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3751/files/nutricion_enteral_y_parenteral_anaya_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/tenancy_agreement_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/0610/6528/files/learn_old_norse_language.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/10361753089.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/cab_booking_app_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5771/7152/files/fejaxakenofan.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/kaxubos.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/duwifuwitaxik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005824.bin
5214fb255e8b658b4383ecd314c1dda2c0d4425ca2f710e9322a7e30256527d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5824 5064 bytes
font_01_sfnt_off00006929.bin
31e01fbf8c16f71f76d9e4f5b1f4bed5ea794a169e6f9ff8a4d9534013e39b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 10620 bytes
font_02_sfnt_off00008cb6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB6 4324 bytes

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