Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fde271538702cbe…

MALICIOUS

PDF

118.4 KB Created: 2020-08-07 23:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c01381def908bbfe0eb8f7ecefb06430 SHA-1: d057a2baaf495f2dc102357526cefc697a4519cd SHA-256: 5fde271538702cbe2ab170e4f126c09bcac55a5cdafd9eba88d22e0317c67015
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reference to the same malicious URL. This suggests the primary purpose is to redirect the user to malicious content, likely for phishing or malware distribution.

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.ru/pify?keyword=carbon+nanotubes+preparation+and+properties+pdf
    • http://sitenug.jacobsladderbrookside.com/uploads/1/3/1/4/131453133/6164692.pdf
    • http://files.katephelps.com/uploads/1/3/1/6/131606343/nesodivuvatiw.pdf
    • http://files.olivia-a-ramos.com/uploads/1/3/1/8/131856531/wexuvejelexife.pdf
    • http://giluzipix.accelerateddentalacademy.com/uploads/1/3/1/4/131453416/desakoxanoxojoregev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6000/1957/files/wendy_s_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7171/5993/files/fanuc_arc_mate_120ic.pdf
    • https://cdn.shopify.com/s/files/1/0428/4026/0775/files/akbar_birbal_ki_kahani_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/76916271440.pdf
    • https://cdn.shopify.com/s/files/1/0445/3256/4132/files/cereal_production_in_sri_lanka.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0309/files/jaxofowuboso.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/fukegamusugano.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/marlin_39a_golden.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/rimapi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/supuvurejugedaxoganevul.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/50780880893.pdf
    • https://cdn.shopify.com/s/files/1/0429/6622/0956/files/xuvevexunor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/zekijeli.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/tibedaguzazefudiwupokiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4165/files/due_to_owing_to_because_of_exercises.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017cf5.bin
5917bb1af97fb015c8aa2dbdf1e414e9bb6a27f8fc89df50aad1db2ea112326f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17CF5 5048 bytes
font_01_sfnt_off00018e24.bin
41d08a277df01f660e4b06d4278658b60f293dfdbfbe7a226c5705235b44539b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18E24 11888 bytes
font_02_sfnt_off0001b617.bin
1d6ad76e3b95a5aa8a98ca802689fe1bc1a3a78d2e4908637de8e66538acfd30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B617 16152 bytes

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