Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae2fbd6e3554ee5…

MALICIOUS

PDF

45.2 KB Created: 2020-10-26 01:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 76f912ff1f786a576002b8f057df9f92 SHA-1: 2e9379252cbb309bbb99350c8700e6b41b204c40 SHA-256: 7ae2fbd6e3554ee5b7107e176b5ebf9bdf502c062efdfb39a4afc4a0473365d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, one of which, https://gettraff.ru/wb?keyword=impacts%20of%20informal%20settlements%20pdf, is flagged as a malicious redirector. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection attempt.

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://gettraff.ru/wb?keyword=impacts%20of%20informal%20settlements%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f8accd1f1aac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8765b427e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8748eea81f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f8cfd4299922.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f8f3f7d2f458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f87b448b69c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/chinese_food_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/incidencia_cancer_de_mama.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/46165947156.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/formulas_de_conversion_de_temperatura_celsius_fahrenheit_y_kelvin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9085/3540/files/41311951912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0919/5162/files/nc_connections_academy_durham_nc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5955/9065/files/nepal_cable_tv_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/54_inches_by_74_inches_in_feet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4702/2492/files/61393636579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/piwaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5443/8846/files/bobimon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/blendy_stick_matcha_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8715/8166/files/epic_minecraft_builds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7759/4005/files/thegomom_worksheets_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/11254036010.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/propped_cantilever_beam.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/pitotivenejanajel.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_off00006f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F55 5236 bytes
SHA-256: 28d02d5453dc690b6520332848ed614954fefdee5c96a19c0e0b1a86cb0dcc31
font_01_sfnt_off000080fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FA 10756 bytes
SHA-256: 938cf3952be636f828fb15c591d10a650c4b93fe35ff88f3e95d8fefe0772f6e

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