Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d912e109e7fd8e…

MALICIOUS

PDF

53.8 KB Created: 2020-11-01 11:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4946ee0f78f419e1d51c0c19658f8ec6 SHA-1: 9195061e06daec543bc459767087aac0e5dd5a68 SHA-256: b2d912e109e7fd8eaec7fd775676f874ca13b3d96ef7051f54e7b402408b157f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, constituting a link farm. One of the primary links directs to a known malicious redirector, ggraff.ru, which is likely used to distribute further malware or phishing content. The ML classifier also strongly indicated maliciousness, supporting the assessment of a malicious redirector.

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/123?keyword=fantasy+costco+reddit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f9035b8ec82d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_5f9a476330aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f9675e413b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f9e56cfef644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f94323f78622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f89ccc49bde9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f9e4ce21e2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f8aa85645316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5f9196b954573.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/muxabet-tixape-rupivivedovuken.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/18e16551-e0f6-4c0a-a094-b5724212c716/sap_fico_resumes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891d2656-a712-480f-827b-517a866cc589/jijezebimowojolol.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/16039698433.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/medewunu.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/25562582322.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/64615437505.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008ffa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8FFA 26008 bytes
SHA-256: 0088f00e8c746316091b173254f908f3c13f5e1acaae4af9a96461daedbb3a7a
font_00_sfnt_off00005c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C98 4748 bytes
SHA-256: 07abcf773b08e4c068cec4b73e08547271c9971a5838caee37277be06a6359e4
font_01_sfnt_off00006cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBE 10232 bytes
SHA-256: 02c6a3d47a405ee9612371c6f5d8013c93263783a8c040eb017a8f9c4b631673
font_03_sfnt_off0000bc28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC28 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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