Malicious PDF — malware analysis report

Static analysis result for SHA-256 725302238b89aca8…

MALICIOUS

PDF

72.0 KB Created: 2020-12-28 18:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b2fa70fdacddc3f92bd4417a1b362803 SHA-1: 82e112cb0b330b4aa85712f063bc1dbb37dcecb8 SHA-256: 725302238b89aca82ffc026fecf7600b2c2e79092bd5b8b0c626f6927ba9acab
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL points to 'traffine.ru', which is flagged as malicious. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious URL is sufficient to classify this as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=baby+jogger+city+mini+gt+stroller+anniversary In PDF document text
    • https://cdn.sqhk.co/dupeguwova/hf2JnWK/headhunters_io_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_5fbb58651f2b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f87b41b03ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8bf99b3632d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5fd6188d563d1.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/kitakilesa/17406754145.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/local_tour_guide_iceland.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/6215637421.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/house_of_night_book_5.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/age_of_wonders_3_maps.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_off0000db17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB17 5544 bytes
SHA-256: b22fd2d940701e8ed2658ba7adf1ae61e952ede3abfa561767a19ba62efba245
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 10984 bytes
SHA-256: 132db9b7f82bc77dc4fffe8715eea0d326fe3be68a8e06dc4d782027d42b72c5

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