Malicious PDF — malware analysis report

Static analysis result for SHA-256 659692188b85cd1e…

MALICIOUS

PDF

77.7 KB Created: 2020-08-21 23:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3969f9bbf878451d1fa7fed80570066 SHA-1: a28bcde364f1f5fc8092b7a5c533e2fbfce30c78 SHA-256: 659692188b85cd1ec643015453ce81f64e57a0b9fe0e051a90870aeb00e33c67
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector to malicious infrastructure, indicating an attempt to lead the user to a malicious site. The document body and heuristics strongly suggest an advance-fee scam lure, aiming to trick users into believing they are eligible for a prize or funds requiring a delivery fee. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=arkansas+state+fair+food+guide+2018
    • http://zikefe.shibuecaribbean.com/uploads/1/3/1/0/131069759/8501476.pdf
    • http://files.shen-vada.com/uploads/1/3/1/6/131606121/nekaxuzorukepuzotoda.pdf
    • http://files.sfhsfbla.com/uploads/1/3/0/7/130775934/xovix_sevabijuburezaj.pdf
    • http://xidalasi.cshstheatre.com/uploads/1/3/1/8/131871721/5e0ac.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4038/8758/files/33505232701.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/heat_shock_transformation_e_coli.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/vegomax.pdf
    • https://cdn.shopify.com/s/files/1/0450/3502/8630/files/windows_10_command_line_reference.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/39337545737.pdf
    • https://cdn.shopify.com/s/files/1/0435/0391/1076/files/civil_engineering_books_first_year.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/goletopunoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/1264/4251/files/nasemudokupewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/69614487686.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/95271900461.pdf
    • https://cdn.shopify.com/s/files/1/0428/9062/5191/files/get_your_guide_vs_tripadvisor.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f32d.bin
de00493f2d8edfaa7bde5705ef98904920e1eabb7a776aff131d8b878fb01a9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 5616 bytes
font_01_sfnt_off00010658.bin
30071b66604bb3892eb0755b175dfba59e87ac0904927550b4e357af12c01768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 10352 bytes

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