Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc3c619864caf7d…

MALICIOUS

PDF

48.1 KB Created: 2020-11-02 10:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3c0c0d60581d1169abee1da144db096e SHA-1: 2e72b60dbae9765d1380c776844455ccdc09bfa0 SHA-256: dfc3c619864caf7d4b4a612988d5eaa7d73824517a250d13ca6fa8f57e94b52c
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/strik?keyword=translate+cellular+phone+to+spanish'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for a phishing attack or to download a secondary payload.

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/strik?keyword=translate+cellular+phone+to+spanish In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f915a5842de6.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/kexigozogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_5f951a0a6897e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5f99bc49a1438.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/gulapore/ted_greene_chord_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/ti_nspire_calculus_programs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0975/1218/files/airbnb_coupons_january_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c4075e-cb3a-4d96-8424-af007aefab21/bikixigorasetukidijopasaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e9d849-c3c4-4c78-9739-1920d63291f9/dalusofolefekazago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7482/0528/files/rafuvipibik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7261/3280/files/robert_waggoner_lucid_dreaming_gateway_to_the_inner_self.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_off00007e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E39 4968 bytes
SHA-256: 2e76e7290c82ce905636999f4207c772c3e9299a5956ee140fafc214b25686a6
font_01_sfnt_off00008f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F13 10980 bytes
SHA-256: b21b5624dd9fcc802bdff112c848a476dfc244e4d49c1ce3f77a0fac7ff30a88