Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ba100f06615956…

MALICIOUS

PDF

46.3 KB Created: 2020-11-01 07:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d657e0fa47bc07e4f5d663441dc8b486 SHA-1: 47d04919afd187036fa00852d124bd5152433e33 SHA-256: e6ba100f06615956ac8fff72db05d42520f8d37bd19bea995a5f0f2fba63ea0e
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/wb?keyword=martynas%20driukas%20knygos%20pdf'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector is sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=martynas%20driukas%20knygos%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f96195aa6ff8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5f9157b4bd14d.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/d9f4bb09-fc2c-4bb8-bea3-8401a77cc511/oral_motor_exercises_for_speech_clar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94393bbc-a733-465e-b7b7-669992111417/fosugefezafowotexef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41180baa-4263-406c-9eb3-55bf6a74f05e/suzuki_5.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/bankersadda_gk_capsule_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/descargar_biblia_lenguaje_actual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b918e9f-77f6-4799-a7a6-dbc0804cac80/zesuzofikoxajeb.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/abilene_reporter_news_police_blotter.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 5348 bytes
SHA-256: b7cbad152a5439300bd1928d200adee76da6d9ad6d0c16d53a37ecf0d9e957a4
font_01_sfnt_off00007110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7110 12944 bytes
SHA-256: 0d707ef670ebe5e8c52cea9f477fdfd710dcebfb78a7e78f2ae19f9e9be4a5d7
font_02_sfnt_off00009749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9749 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501