Malicious PDF — malware analysis report

Static analysis result for SHA-256 b623443ffc8d4756…

MALICIOUS

PDF

60.9 KB Created: 2020-08-08 10:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3238ab77ed6f9e2a16da889b068ae1a SHA-1: 5aeeb0d84ad4e6a99f224a9014889041af7d2153 SHA-256: b623443ffc8d47569c98574fb0eda34d2b32bef0c85723e88348a0e53895c4f7
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to ttraff.cc. This indicates a phishing or scam attempt designed to lead users to malicious content. The ML classifier strongly supports the malicious verdict.

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=affairscloud+current+affairs+pdf+june
    • http://files.ancestorscouture.com/uploads/1/3/0/7/130775180/nuredozoti.pdf
    • http://files.severnwildlifecarvers.net/uploads/1/3/0/7/130776589/nopoxixavuma_raxikadozipap_simogaxigu_kimediganos.pdf
    • http://files.ardenandscott.com/uploads/1/3/1/1/131163976/melusejot_guxuwugovufubiw_riziwonigaturig.pdf
    • http://files.heebeegeebeehealers.org/uploads/1/3/0/9/130969845/21c3f6.pdf
    • http://files.qecareereducation.ca/uploads/1/3/0/8/130874608/9719411.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64238793182.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/rumivolaraledomodopug.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4437/files/37607513674.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/50941248641.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0437/2027/8171/files/jirozaxagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/21245686284.pdf
    • https://cdn.shopify.com/s/files/1/0436/7053/6345/files/appcoda_generation_ios.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/cheats_for_the_forest.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/manad.pdf
    • https://cdn.shopify.com/s/files/1/0437/9036/8929/files/kuta_software_factoring_quadratic_expressions.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/65408199190.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_off0000b096.bin
85c6514764c9c92d375fb3897364d7afcc2e1c0a4d53d72b2efb2412df576a4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB096 5212 bytes
font_01_sfnt_off0000c26c.bin
78b6900e698dbe56e01922fc4d093feda865b738fb581f1fe11122309cd31c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC26C 10608 bytes

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