Malicious PDF — malware analysis report

Static analysis result for SHA-256 295a097acbccac8e…

MALICIOUS

PDF

80.4 KB Created: 2020-12-06 09:56:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4549370316914407024566240cd778bb SHA-1: bca139455c5b752e986c5cdb9d4511aabd55464a SHA-256: 295a097acbccac8ef41d45d01d1e085615ab9228d7d7a109cf45c4f889558e73
94 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to known malicious redirector infrastructure. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious link within what appears to be a product review. The primary IOC is the malicious URL identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic.

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://gettraff.ru/aws?utm_term=biotherm+life+plankton+mask+sheet+%25E0%25B8%25A3%25E0%25B8%25B5%25E0%25B8%25A7%25E0%25B8%25B4%25E0%25B8%25A7 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fc950d501027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fad7d859926b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376359/normal_5fbc8f75155b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5f8e4f6fb9a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5faf028b622de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f872d54568c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370051/normal_5f8d1c545b2f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_5fbf641831539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_5f994deb7f551.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3cbc2dd96f5918ba030d/1606302910041/download_minecraft_pe_0.13_1_apk_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc2431d3485235c86116190/1606566686556/salvaje_pronunciation_in_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc583aebf71053ccb2ee7e6/t/5fc74d40ad3e64119243864d/1606896963312/xupazudovegasofabalar.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/eight_legged_freaks_2002_cast.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 5252 bytes
SHA-256: a17663c34ac4f5b3fbede2beeb4b41fc6523d74f2588166fd33f76b0f787789d
font_01_sfnt_off0000e4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AF 6280 bytes
SHA-256: 231b1b8ed95992f724824191b1128cd87bc8f0ae91ca89720f9cf450d9ae1e29
font_02_sfnt_off0000f4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 8548 bytes
SHA-256: 4f24bf3d428a854072601d3564b24571b0e2a9a793fba1354a5d3350e53d2a95
font_03_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 11208 bytes
SHA-256: f104bac62f8ea81697f2b2deec4b65555a74698c7a6c5c3bb839866bae6e1c66

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