Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b781f66be9e2fdc…

MALICIOUS

PDF

63.1 KB Created: 2020-08-07 13:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb7390b62a49e629f6bf148055c0c7bc SHA-1: 879092722781a0c84c0b724258c43294b9f3c46c SHA-256: 0b781f66be9e2fdcc893a4fb8be2aa25c446dcf3b38cf11075b8e6c5bc02ae0e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/wb?keyword=laser%20interferometer%20pdf
    • http://files.councilofgiants.co.uk/uploads/1/3/1/3/131398547/6416889.pdf
    • http://jegovi.premierbeachfl.com/uploads/1/3/2/6/132682883/tojofexagilijot_nikuma_fasoxovases.pdf
    • http://files.arcadianvacationrentals.com/uploads/1/3/1/6/131606745/wineduloga.pdf
    • http://duwirek.crpsummit.org/uploads/1/3/1/3/131384635/a373f3bc22f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/articulacion_codo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/75109001255.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/tidixeseperivakut.pdf
    • https://cdn.shopify.com/s/files/1/0432/0120/0288/files/predicate_argument_structure.pdf
    • https://cdn.shopify.com/s/files/1/0429/8945/3473/files/zetapisifolowus.pdf
    • https://cdn.shopify.com/s/files/1/0438/0295/1842/files/xutudametutobifafojasu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/rosevusel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/sosebet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/69388644904.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/narepuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0000/files/buwonanozisiwinozeba.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_off0000a556.bin
2a5d0714594e05b17c9e9138df6f8e44f8544623eef17636fce3fb4a56db1c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA556 5096 bytes
font_01_sfnt_off0000b69a.bin
4f9834d903b341d6454393996b3c862d50a30f755750ab3e8068cd13a06f2c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB69A 10264 bytes
font_02_sfnt_off0000d9ec.bin
aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EC 16148 bytes

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