Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dadc6f9bf855054…

MALICIOUS

PDF

42.5 KB Created: 2020-10-15 10:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d1c7b8ea086e9d598460e5ba526150f2 SHA-1: 578529cf564c29bad9ad74fe5eb0c226dfd4139a SHA-256: 3dadc6f9bf855054f6f74ad0f80e8a9311ff2c04e2c222ff5edf719ca9705e55
124 Risk Score

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 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=difference+between+bjt+and+fet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f87b4299b26d.pdfIn PDF document text
    • https://site-1041926.mozfiles.com/files/1041926/know_my_phone_number_android.pdfIn PDF document text
    • https://site-1038770.mozfiles.com/files/1038770/67579782328.pdfIn PDF document text
    • https://site-1043938.mozfiles.com/files/1043938/wixolawezebedejoporulufit.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/45172390673.pdfIn PDF document text
    • https://site-1038913.mozfiles.com/files/1038913/94216591294.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/naranob.pdfIn PDF document text
    • https://site-1044163.mozfiles.com/files/1044163/xiluwigonosetufor.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/1/0481/7125/3911/files/natalisunowowenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4627/5752/files/92566290160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/ever-evolving_exotics_tucson_arizona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d38bf3-53ac-42ad-a699-4f5985e40125/mufuvujevuzorijikutexik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9d82e5-f2fc-4f10-95ac-bf1f8237ef0c/42114086680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c36895-50b9-414d-b69c-2e572cfac810/zulozotawixube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d538b6a-784c-4ced-90a2-00a04de7a7d8/38603100237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1233ea16-ab9c-4096-8d1b-8d4d6c9ce7c7/jisubudabolunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/591dbcc7-4c33-4870-a398-2a62429844c6/pebikisifakubapadizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b61ca63-c075-4739-ab06-dbd5d58a9708/vezenizewewinapip.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_off0000697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 5244 bytes
SHA-256: eca677cc431e96ea13ca915cb1b87dad07bd91011b78e5e79fd1465c4637f5f8
font_01_sfnt_off00007b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6F 9812 bytes
SHA-256: 178c7501648e3cb59b7b9ea92485fa231da67a88d4611a0388e559ce0e8b0bfa

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