Malicious PDF — malware analysis report

Static analysis result for SHA-256 d764c77737dcf253…

MALICIOUS

PDF

47.6 KB Created: 2020-08-20 02:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e286733ccd959fbdab0ab891d14efd8 SHA-1: 601ecadd697b76d103372dfec01cdb785b5b533f SHA-256: d764c77737dcf253d6e277007b24ae22e678aef8f13bfc2b2d5b38cca8b8f54c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, including a critical link to a known malicious redirector at `https://ttraff.com/pify?keyword=baby+doll+movie+video+song`. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=baby+doll+movie+video+song
    • http://files.watsonhill.com/uploads/1/3/0/7/130738975/9362585.pdf
    • http://popozuza.keithtuckerauthor.com/uploads/1/3/0/9/130969140/simigukobemijewasa.pdf
    • http://folixi.jamesscode.com/uploads/1/3/1/4/131437949/ranafipobigivolekoj.pdf
    • http://punike.under--17--driving--lessons.co.uk/uploads/1/3/1/3/131379179/8603136.pdf
    • http://files.glassplaqueawards.com/uploads/1/3/2/6/132683334/zudirulidaxoroxotex.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0181/files/48292392503.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/kewimolide.pdf
    • https://cdn.shopify.com/s/files/1/0438/9535/7595/files/bordereau_de_dpt_desjardins.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/67306291372.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7612/files/91533656945.pdf
    • https://cdn.shopify.com/s/files/1/0457/4923/9964/files/search_engine_optimization_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/legujunegi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/39855136881.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/72591223939.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/database_hoarding_and_caching_techniques_in_mobile_computing.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/gunuxerutog.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/38066518127.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_off000071d3.bin
7b5a767ace704cc9805297bbae7aa53424733b8296e0dc7a8102f9de7635bc5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D3 5400 bytes
font_01_sfnt_off00008422.bin
db10b07aa1ba911afaf060b12e2cde8c70dbbf9941f30369d108722010ce9547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8422 1648 bytes
font_02_sfnt_off00008c6c.bin
e43a21c1dd3a8f995a3d01eb6e15e5b93bf4c7fa7616d6fd632b08509eb0a86a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6C 10784 bytes

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