Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3964d39b036012…

MALICIOUS

PDF

37.9 KB Created: 2020-11-05 09:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7e93e97a6d235235677179525ff73de4 SHA-1: 981a1082f6358f1a1ea86399395848d4f257a8cc SHA-256: 8f3964d39b036012f341bec7b7e9c2921e046c3d1a7dc0efeb06094e424a0772
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious sites. The document body and embedded URLs suggest a lure related to 'agar.io hacks chrome', indicating a phishing or social engineering attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is intended to compromise the user.

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://ttraff.cc/123?keyword=agar.io+hacks+chrome In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_5f90402842736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_5f9de44b0a008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5f9971a6354a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f96c51d5b1fa.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/xenepedu/scrap_metal_5_paco_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de691936-d8a5-4980-8344-ebcf7b87a3c2/gobel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17aeeed-e63f-4423-84d2-42d96559888b/95661940520.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/dafekukufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d28548fa-a6da-4e8b-92a8-6935ac660120/93289207566.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/30635037543.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fba039-bbaa-4a56-a048-6c9dacfccffd/2002_yamaha_big_bear_400_service_man.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/the_butterfly_effect_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fb9f91-b604-4855-a04a-707e539b2219/zedasatebuga.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_off00005836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5836 5264 bytes
SHA-256: a63484fa1446fb82ca8fc4d4f8ae8f33f74b962b0edc87debbd2be6cc3548ce8
font_01_sfnt_off000069fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 9940 bytes
SHA-256: 61c94bf9168ee53ee2d17a0685ed71b29972db6ca9c29dc62f506826b42c93e4