Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b4196e48146c9c…

MALICIOUS

PDF

40.9 KB Created: 2020-10-26 11:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: b647153f1334ce699a731c5e4fc30032 SHA-1: 74456fb3b4e81548508dfda8c77a7aa259968070 SHA-256: a6b4196e48146c9c7b02c142b8e94826c71e8878f8c000324a07d29fafb61516
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.link/123?keyword=tombo+legal+manual+usado In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_5f94606604433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f8d293bf0192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f914546c9a5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f94d18a91d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f96087f0c2c8.pdfIn PDF document text
    • https://xekixudag.weebly.com/uploads/1/3/4/3/134336078/ddafe145db8.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/xipil.pdfIn PDF document text
    • https://kexinebig.weebly.com/uploads/1/3/4/3/134338338/xozononusupexijokidi.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/7816021.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/f56550bc546.pdfIn PDF document text
    • https://vonolorijamitef.weebly.com/uploads/1/3/4/4/134452045/gexez.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/72e37.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/e0dee405ead17.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/fizusirepo.pdfIn PDF document text
    • https://vibebivenef.weebly.com/uploads/1/3/1/4/131412032/dexenov-lorupuzixa.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/gigabukoles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f563bf-99b0-4ee3-bf68-536bbafb00ff/zunimow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bde37a5-ada3-48b6-ab45-94bd4f1ea3f6/13189771032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5862e03f-ae5f-4485-829e-e217f19f17b3/91710118055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f4bfe1-8982-49ce-9d94-1de0e5be3e5f/rixalipebadojizabux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60481ef9-b03e-426b-89e9-435512a57a68/novopi.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/ignition_system_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/bihar_si_syllabus_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/assembler_directives_in_8086.pdfIn 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_off00005fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCC 5136 bytes
SHA-256: 795ab2045cf785f85845a77fb4151121008413d34f84712e3a93bf24aa56e1ea
font_01_sfnt_off00007134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7134 11396 bytes
SHA-256: 84901d15b1fff79a29de8b52b66108c72275e9a58f50911fea12936f7abb6640

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