Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc7c724bc8549c3…

MALICIOUS

PDF

46.8 KB Created: 2020-11-04 11:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0e5ce974f96659453f93a2d6948efa28 SHA-1: b1723e19bd034e01847d9d0e22a8ba9f715c1424 SHA-256: 7fc7c724bc8549c32781c9e7b246c4768b36d316e8ef465cbb6c8ef813c1c4f6
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised as a US Secret Service application process. The ML classifier also strongly indicated maliciousness. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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=us+secret+service+application+process In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392463/normal_5f8e2b2f70261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_5f9645d4d9c60.pdfIn PDF document text
    • https://jirunemopisitex.weebly.com/uploads/1/3/4/3/134332051/zixab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8713da981d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5f9c9eeeb5c99.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/105a1c7e-84ba-466b-b37d-13af42e0dc43/vowezelolomubitowulogagi.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/all_of_me_piano_sheet_music_piano_guys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd26039-b058-419c-b1e7-692c2e4fba72/lezesoxawozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27588728-6afd-4505-8c1b-a78814810f21/gefejavumisubaserepalakis.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/radod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e8ba3e-f61f-452d-a206-b6c327ec5698/ji_suk_jin_knowing_brother.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/dmv_ambulance_drivers_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1d65f8-7418-450b-9b63-4da13937bd5e/79861122765.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3D 4764 bytes
SHA-256: cf1027a146803c5a3f6956d1703c73325f07bfcc9e580cbd467e9e45b4bdbc06
font_01_sfnt_off00007c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C79 10420 bytes
SHA-256: 0a6e53da6626bf57d1ec374df28b95b13d7fcc5a4648bfb6967ea4d55148748e
font_02_sfnt_off0000a02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA02D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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