Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3fe668f19e478c…

MALICIOUS

PDF

177.2 KB Created: 2020-08-22 11:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0319fbf773111e4170f192b888893fd SHA-1: f534310770e10ef9c113383ec6b5a67a81c6e500 SHA-256: bf3fe668f19e478c9791eabf61af71780b350195947b19fe0debcbe648594550
94 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.ru, which is disguised as a document about medical guidelines. The ML classifier strongly indicates maliciousness. The embedded URL is the primary indicator of compromise, likely leading to a further stage of attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.ru/pify?keyword=onychomycosis+treatment+guidelines+2014
    • http://files.wildwindsboutique.com/uploads/1/3/1/1/131163969/3412609.pdf
    • http://gunoviz.vividconnections.co.uk/uploads/1/3/1/4/131453645/32b67c43df.pdf
    • http://files.porterrc.com/uploads/1/3/1/3/131398526/4035958.pdf
    • http://files.calabrianservices.com/uploads/1/3/1/8/131856949/7682830.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/elementary_probability_theory_chung.pdf
    • https://cdn.shopify.com/s/files/1/0452/3904/2205/files/76844012922.pdf
    • https://cdn.shopify.com/s/files/1/0437/1709/9685/files/tunapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/craps_game_java.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2840/files/gixalowupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/nowimibutixomoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/59303192325.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2678/files/vogelumoxiwivubudetod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/95360196840.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_off00024a43.bin
3e7ce241e7693f6ff2f715d86ea38a625e9948d566ac433fb3461f53b03813d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A43 15060 bytes
font_01_sfnt_off00027bc0.bin
1d9f08a556df07c09f912dd2051207c121eaee01899313cb0c6a133892079878		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BC0 5896 bytes
font_02_sfnt_off00028fa8.bin
b89babadb2420ac1800bb704d7e9d832b57d1fc8fd9ddffd4b49d6f271366d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28FA8 11700 bytes

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