Malicious PDF — malware analysis report

Static analysis result for SHA-256 f85e2e5b4be8b888…

MALICIOUS

PDF

83.0 KB Created: 2021-01-17 07:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 95df307bb9487d1fa5a6dea01dd33576 SHA-1: b5ac81e43cd3cca9bba9a281eb9ccf2402e5c5d7 SHA-256: f85e2e5b4be8b888089fdd6e930869a3416d2dedd1215a2a81609acd5eeba3bf
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 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. Although the document body is heavily obfuscated, the presence of a malicious URL suggests an attempt to redirect the user to a harmful site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=ant+man+and+wasp+putlockers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5f97d7ec852a7.pdfIn PDF document text
    • https://site-1239165.mozfiles.com/files/1239165/xbox_emulator_android_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487618/normal_5fe94e4564e9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464302/normal_5fc3ef6e08511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5f92847c9c4a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8ed6469e675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fc5c0c7a1a7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465705/normal_5fcf0afdded73.pdfIn PDF document text
    • https://site-1174272.mozfiles.com/files/1174272/download_tubemate_apk_old_version.pdfIn PDF document text
    • https://www.researchgate.neIn 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://s3.amazonaws.com/lejivugeleguwod/the_binding_of_isaac_rebirth_guide_deutsch.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/nirowu.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/sirefu.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_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 5200 bytes
SHA-256: 41b612624f23edd9d4e571197b2de905cab3ea1f09d2d5d725f2946b00717b8e
font_01_sfnt_off00010850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 13052 bytes
SHA-256: 13af63c6d30c28185738e4bbde8bd80cbf8d629de97eadac1c650eb473cb05d4
font_02_sfnt_off0001315c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1315C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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