Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d816eaf46dcae70…

MALICIOUS

PDF

38.1 KB Created: 2020-08-13 23:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 543696c7bc5a53e814614cfa9952b1b9 SHA-1: d00e4fb9f0afb64ea8624100c1ade1a85f2b13d4 SHA-256: 6d816eaf46dcae70fc6d3e8f9021223b3830825b4b4c84f44b9e0086e92a8862
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to potentially malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'master chief helmet template PDF'. The presence of numerous links suggests an attempt to manipulate search engine rankings or distribute malware through a link farm. The ML classifier also strongly indicated maliciousness.

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=master+chief+helmet+template+pdf
    • http://files.ssvtac.com/uploads/1/3/1/3/131384635/xuvaxataxosula_gonubewanepito_tubefalumikupax_tabitomiboba.pdf
    • http://nezisaj.soulawakeningcenter.com/uploads/1/3/1/4/131408899/9420629.pdf
    • http://gugikaxut.tripinary.com/uploads/1/3/1/3/131382078/wariraz_vixofilazaji_gidedepaz_fakesopev.pdf
    • http://files.philippecorriveau.com/uploads/1/3/0/7/130740625/2ba4a52d67.pdf
    • http://files.vitalgateacupuncture.com/uploads/1/3/2/8/132814097/710a0763d546a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/5786/6902/files/pdf_file_editor_crop.pdf
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/rudovupigugomovuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/tuwujubasizexebobelujo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/5858250813.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/bumudosibofureto.pdf
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/lenatabefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/physical_science_grade_12_quanta.pdf
    • https://cdn.shopify.com/s/files/1/0439/7583/5806/files/astm_a530.pdf
    • https://cdn.shopify.com/s/files/1/0437/6176/2456/files/28972115952.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5267/files/medorige.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9663/files/85111642719.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_off00005563.bin
8673d02c436a33d298438d74f74faa29dc68b55fbc5ac90c5ace3e92a4e23f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5563 5400 bytes
font_01_sfnt_off0000679a.bin
978658720a93eb651cdf97e7277020297ad6bd5d15222506a5b08f9a25fd3179		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679A 10588 bytes

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