Malicious PDF — malware analysis report

Static analysis result for SHA-256 773c957060b6d053…

MALICIOUS

PDF

76.9 KB Created: 2020-11-05 22:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 10285accbcdaa70721292e620d95077b SHA-1: a8edbfa771cca9edf5046f5e399c4def12e1125d SHA-256: 773c957060b6d053d0bd5e316758a892c45a444361fd173b92d3daed228416df
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/123?keyword=during+cpr+gastric+distension+may+be+caused'. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a harmful site, characteristic of phishing or malware delivery campaigns.

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://traffine.ru/123?keyword=during+cpr+gastric+distension+may+be+caused In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/depository_name_def.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/mawumalipamudemopuxux.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/describe_the_world_you_come_from_mit.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/12889394022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355acea2-77bc-4c5f-9b1f-b832b9f2f901/53552394490.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/10207629833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff620dca-104d-4d0d-88f1-4907fb96a82c/nawisiwubiwom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57196b22-fe4e-4662-a213-b4bd85014ef7/zavotofewefalijofaturo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64c8cb1-cca4-40bb-845c-de8880b66c61/serugixaxaranile.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/british_red_cross_first_aid_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acafbb59-5d69-4781-9238-5a40201ffdf7/gaxojuxuvevin.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/el_catecismo_de_heidelberg.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/13010986822.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_off0000efd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD9 5604 bytes
SHA-256: ebc1a1fae63594b6a44cdcfc98610c82a2dadf96c33d55d7f4be4eaff4efa75a
font_01_sfnt_off000102de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 10444 bytes
SHA-256: 325073032bf3d6e9d512f181f7a8def9a57d3f61d5327f148e9b0394ebec304c