Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ce124b6ce3fc33…

MALICIOUS

PDF

39.1 KB Created: 2020-08-26 04:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9768d3f71cbc252651edfa65ef7fcea SHA-1: a59eca2b53a582de7a0e88ad66d00f5cff697f70 SHA-256: a8ce124b6ce3fc33010be80d46f0becea38eb81398bb664d35e9f5b93682a3c8
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is highly indicative of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure related to children's paintings. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 2

  • 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.
  • 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=smokker+til+b%25C3%25B8rnemalerier
    • http://files.chromecomputers.net/uploads/1/3/1/1/131163872/1313431.pdf
    • http://files.x-ring.org/uploads/1/3/1/4/131483209/9000163.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/chal_ve_tu_bandeya_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/83685378344.pdf
    • https://cdn.shopify.com/s/files/1/0435/1836/1755/files/wofimefavabuwadavuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/agronomic_practices_of_wheat.pdf
    • https://cdn.shopify.com/s/files/1/0435/7678/7103/files/craft_the_world_achievement_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/tevapisupunozalipexom.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/
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/tevapis

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dde.bin
5b776fa59845e700e1295983ee3f72cff8c251574015f8cd720c958640d242b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDE 5100 bytes
font_01_sfnt_off00006f12.bin
1b92191924c504caa19083e82b3f676467f4036a3b5e53b96f08a525593089da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F12 9288 bytes

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