Malicious PDF — malware analysis report

Static analysis result for SHA-256 e026ccfffede8efd…

MALICIOUS

PDF

34.7 KB Created: 2020-08-16 19:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e0a31763c67f5080b952485b2c2d9dc SHA-1: d7b6070c99717f8946a3248c15a5857ddf458a2d SHA-256: e026ccfffede8efdb1404ad4fceb23d1fa90f429c0e750fa02d4328e0efd0a14
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=aviary+photo+app+for+android', is identified as a malicious redirector. The document also contains numerous other links, many pointing to Shopify domains, suggesting an attempt to obscure the final malicious destination.

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.ru/pify?keyword=aviary+photo+app+for+android
    • http://files.valhallavet.com/uploads/1/3/1/1/131164460/zudovitalewoxotonaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/98517979341.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/nalal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/zekuvirojiboz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9574/files/17125913938.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/foundations_of_college_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demesudixagivok.pdf
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/3d_animation_maker_apk_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/9335/1843/files/convert_jpg_file_to_cdr_format_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/7840/2723/files/after_effects_shortcuts_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/65688279505.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/56330843391.pdf
    • https://cdn.shopify.com/s/files/1/0440/3704/6437/files/38911496375.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/57446007398.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/vilofatexes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/54565529576.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_off00004b42.bin
c6b8f905fc88dfe882baf405489ca2e7afa4db1bcdb7285b32e277903fc51b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B42 5072 bytes
font_01_sfnt_off00005c83.bin
66435847723ae5b2cd8ee778306f5ca1c687a94b6ff46af925261becfbfa4cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C83 9716 bytes

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