Malicious PDF — malware analysis report

Static analysis result for SHA-256 d924fbf2b737fa49…

MALICIOUS

PDF

45.3 KB Created: 2020-10-28 02:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4dbf543a23b383fae7ebec6ef86af017 SHA-1: 2425777ad27ae31bd29f38cfc60ed04d7c82c7ae SHA-256: d924fbf2b737fa49030e865c50cdc44774df78a32de4193dbf5fa4e475e2ef0a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to a malicious domain, specifically 'ggtraff.ru'. This domain is flagged for malicious redirector activity. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm strategy, aiming to attract traffic through search engine optimization. The ML classifier strongly indicates maliciousness.

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://ggtraff.ru/strik?keyword=emporio+armani+watch+leather+band In 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/20be7f02-9a86-4e2a-a35d-c0b07518af49/texto_o_aniversrio_do_seu_alfabeto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d35ee9-b916-4311-806e-2471758fff2c/97549033687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca42336e-80bb-4c4c-8f7c-bf9686e06098/nafivesek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c319843b-f61e-4b2b-9d0b-9eb30c9ad45d/stihl_ms460_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d6b025-7bc5-47a2-ae89-e5dbcbcde4c6/tcl_roku_tv_overheating_message.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ff3227-d2ac-4308-92fb-033a47625832/nurotowafopowakiruji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f23b9c-5335-4cf0-a7b7-9aa64e67c219/63984257705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a54f20-ac83-4bd2-93c4-b5bc54fcced2/gijafalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4721/5000/files/28151100592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8077/0237/files/ribazivapoligob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/fikotujirorexavumaposazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/annabac_terminale_s.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5977/1061/files/ps4_emulator_android_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5926/4711/files/92759289002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/35774573267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/bovixigo.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/sofewajuzunori.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/career_paths_environmental_science_express_publishing.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_off00007305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7305 5324 bytes
SHA-256: f6a3469facc4ee11a5b3f115b029919f959c0878b6b45bbf2e93fcdd3b0e601e
font_01_sfnt_off000084f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F5 10288 bytes
SHA-256: 3948f1173fd3fd3dfffb556a62c58fe4090ebc8ee718a43ad69f398d96ea4ee6

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