Malicious PDF — malware analysis report

Static analysis result for SHA-256 74183dee2e06e8b3…

MALICIOUS

PDF

40.3 KB Created: 2020-09-17 12:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 33a2f900703c1fccc5e90d4da901901d SHA-1: a4d96c2ccfc1d1311752d489f7d31cdfc92401cd SHA-256: 74183dee2e06e8b3c2d91af95db73bbde387cbbe38c168121da56457397371b4
184 Risk Score

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=baidu+root+apk+download+latest+version In PDF document text
    • http://files.ecocaregreen.com/uploads/1/3/1/3/131384468/pavefofat.pdfIn PDF document text
    • http://rerefobe.ballroom-blitz.com/uploads/1/3/0/9/130969932/forojatojelimiwigo.pdfIn PDF document text
    • http://files.charpentierteam.com/uploads/1/3/1/1/131164002/8186607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/barron_s_6_sat_practice_tests_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/21195625459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4658/files/banijowilafo.pdfIn PDF document text
    • https://35ac671e-8e48-436c-98ad-f1555f21c9c6.filesusr.com/ugd/0789d5_2fa2147cfc534f2893cc204ca9def115.pdf?index=trueIn PDF document text
    • https://e09a8763-e7dc-4a72-9f60-6437dcf0152e.filesusr.com/ugd/3bcfef_41f0a314e1dd44029dbc8270c986cac9.pdf?index=trueIn PDF document text
    • https://609ea5c7-3512-459e-9ddb-291e1e92b4c6.filesusr.com/ugd/a58b01_b43be3953f9f472cb829421ec6d3644e.pdf?index=trueIn PDF document text
    • https://2c0fc7c0-1b02-4b48-87ce-07861aef2910.filesusr.com/ugd/b09e1d_4585258a67e64a5e878ff5b0f18cf961.pdf?index=trueIn PDF document text
    • https://a229a4db-81a9-489e-8a6a-589d0ee31073.filesusr.com/ugd/6203b9_354e2f1591a24c9cb6b0935615f8d027.pdf?index=trueIn PDF document text
    • https://054e7e67-3768-40c3-a744-3e26203b5274.filesusr.com/ugd/668a47_4c1c94003aa9420eb61d4fc664918d10.pdf?index=trueIn PDF document text
    • https://004d861f-1be0-464d-b708-85c273f01c79.filesusr.com/ugd/359e64_c825d043144f416481de57a1859f3acd.pdf?index=trueIn PDF document text
    • https://012c4198-c0f1-4f6b-bb23-ebf04fc20f23.filesusr.com/ugd/3dd68e_ea2ce161e03a4c9d9ac0a0967695747e.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F59 5216 bytes
SHA-256: 0d56b8d649e70a8ef132e50dae214e6b04c2a9ea7539a1dc6e962a7abc9bf7aa
font_01_sfnt_off0000713f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713F 10340 bytes
SHA-256: b16af5562f1a79282902bfe17081d058df8cf64c48182856ae2950df22597872

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