Malicious PDF — malware analysis report

Static analysis result for SHA-256 86099e9c2c8050f9…

MALICIOUS

PDF

59.9 KB Created: 2020-09-04 06:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 503ddc4aa5d7cc64668811cc28329417 SHA-1: fa9f18e80107c53d8cca1f42daccf996dcdd05f8 SHA-256: 86099e9c2c8050f9d3286bec855055c3d995f36f146680480c4261c1e05947f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive lure related to a 'Netflix premium account apk free' and embeds a link to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate malicious intent, likely to lead users to a phishing or malware distribution site. The ML classifier also flagged this PDF with high confidence.

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.link/pify?keyword=netflix+premium+account+apk+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/3046576927.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/51399364682.pdf
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/credit_card_information_over_email.pdf
    • https://static.usrfiles.com/ugd/b8c837_d38277e2a9b847398950cba23cbe59a6.pdf
    • https://static.usrfiles.com/ugd/0c4177_70c80c572e5d463c9023a10c8df2006b.pdf
    • https://static.usrfiles.com/ugd/a382ee_d819d844347a4329bab43de93ed512cc.pdf
    • https://static.usrfiles.com/ugd/191a6d_3eab8680df944f74a0f9a2cc8b613aa8.pdf
    • https://static.usrfiles.com/ugd/d55797_3185be7036e242a19fcff7753cb9f35d.pdf
    • https://cdn.shopify.com/s/files/1/0433/5304/7195/files/singh_is_king_film_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/5090532430.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/remokonirotojugapagoliger.pdf
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/96225298660.pdf
    • https://cdn.shopify.com/s/files/1/0440/7413/9813/files/cash_flow_management_in_construction_project.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/64188791337.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3359516262.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/xediwarotufavixaxete.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008818.bin
2247430fa59110373915b40cee4010f63f343844f52b6e38a1826c5ab4372fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8818 5084 bytes
font_01_sfnt_off00009952.bin
1df77d16be7156084e8caff260e756c970f4813a3e676efd01c7eb4f898884cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9952 2920 bytes
font_02_sfnt_off0000a5c4.bin
1c43bf4208ba33b3c1e4f0830c33caa5455b7eaa8cf52f53e9fb8cf33301f1d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C4 10652 bytes
font_03_sfnt_off0000ca65.bin
9a6e19cabbcbcd6414ca5da6c54991ea7d4656a08992e3c7ab7cec245d6ab073		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA65 16856 bytes

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