Malicious PDF — malware analysis report

Static analysis result for SHA-256 01155187dda514d3…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 17:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1172f861670273c4aa824098d76244cd SHA-1: 5b214e1b187825a4412cad38685b18762e375df5 SHA-256: 01155187dda514d36a9109e20cd7e011e3c425816ce14723f96cb73013c391f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link/Object: Malicious File

The PDF contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic suggests this is part of a larger link farm operation. 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.ru/wix?keyword=networking+all+in+one+for+dummies+pd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a2c2bc_f452ce74a80b4a479318e90fdcb6488a.pdf
    • https://static.usrfiles.com/ugd/99965f_5c0f2f7acbcf43dab498f3fa62de04ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_4de5c01c304244a2830e8bc241186176.pdf
    • https://static.usrfiles.com/ugd/9cfd0a_fc3c1895198c41daaaf1b03c4c7ffc79.pdf
    • https://static.usrfiles.com/ugd/529dbf_702d28db12334ee38cdb54123bc3a649.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/memejojowuzetufufeg.pdf
    • https://cdn.shopify.com/s/files/1/0439/7731/0366/files/nociones_de_derecho_positivo_mexican.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/jasuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/86168475247.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/warhammer_40k_8th_edition_orks.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/sidosowina.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/blender_2._8_shortcut_keys.pdf
    • https://static.usrfiles.com/ugd/50de67_5cf75d84556c4d8d8a30b3f829f29d3b.pdf
    • https://static.usrfiles.com/ugd/d775a9_03eb1b9741d448abb6489a75d3a86b04.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6ba4b36a0154c989d0c4a13047bd913.pdf
    • https://static.usrfiles.com/ugd/82e28d_dfeab7cd3e454c91a3875194b64a0ff4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d29f84383674b1c9f043a0dd805f1cf.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_off00005970.bin
9d602153ad6d167fa2f6fca717193990a8422357ba3a9fa2e0f5a8ec5a2d8c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5970 5484 bytes
font_01_sfnt_off00006c20.bin
12c988d2d6fcee7ce4b7341ca4e92fd8f78edeeebf821f8fc3245298e5a88bbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C20 9712 bytes

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