Malicious PDF — malware analysis report

Static analysis result for SHA-256 77744b347503c9fb…

MALICIOUS

PDF

40.5 KB Created: 2020-10-16 09:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ebe3770dc2a6ed7b419776e750082dd1 SHA-1: 41bacf7cd559c8258e87c39e4d9c25fe3ea2b337 SHA-256: 77744b347503c9fbbfb89dff5c17f89098bb1105ec92d6bb033f15ee12e092e1
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://gettraff.ru/123?keyword=online+soccer+manager+guide+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8724f72ce05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5f89265731ad8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f87da7f4a8f9.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/1145be3e.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/lejesof_jenizo.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/pularawawa.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/rotolorozadinif.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/dalonudizuzuxulu.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/6108684.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/3216551.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/69f27cc8-e95a-4140-834b-909e7705895e/wewanogesanefitabefaxedaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4feacdd9-7bef-4f23-af74-c9a618cb7b90/40229672818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95405d17-088a-4aba-aaf2-ae2d7cc1b955/69473090285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9537/9105/files/mapa_del_estado_de_oaxaca_y_sus_municipios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9622/3133/files/97909128007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2392/files/bifadujegukasij.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_off00005f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 5560 bytes
SHA-256: fb0b3caa0950a19cc02780cbb2951ada577105e558fbf4627d04a5a28998e64d
font_01_sfnt_off00007263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10088 bytes
SHA-256: 42d2e5cae6f4b9a080ea0db3316affad1269fe333eb74e4fa9699e4dbc83f24b

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