Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe23aee143a31a6a…

MALICIOUS

PDF

43.6 KB Created: 2020-10-26 02:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 41913ba8b087b259a7057f517984589c SHA-1: eff94c203fb9152f609c7e1e01995f31f6ba2b85 SHA-256: fe23aee143a31a6abd2d8407e42781975d9799502e9a0b0f4b0c990f50e5c3da
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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://ttraff.ru/123?keyword=corticoides+inhalados+pediatria+pdf'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure the user to a harmful site, likely as part of a phishing or malware delivery scheme.

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.ru/123?keyword=corticoides+inhalados+pediatria+pdf In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/3754839.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/duwizom.pdfIn PDF document text
    • https://mibebedobosuv.weebly.com/uploads/1/3/4/3/134322580/103742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f87675e476db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f89a9f8e9acc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f8d9729ad3e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377925/normal_5f9469149c54a.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/susopuzupure/sociologija_slavo_kukic.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/88228145459.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/reflection_and_refraction_of_waves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0291/0660/files/kymco_super_8_50_2t_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/missouri_state_board_of_cosmetology_practical_exam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5526/6978/files/crossroads_of_america_college_showcase_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/6539/3319/files/the_art_of_coaching_volleyball.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gupulojoxex.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/bullet_journal_printables.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_off000069bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BB 5148 bytes
SHA-256: 5c607a5ee62eff13092c10e0618313a6742de00a2223086ea10d5a0f9025e311
font_01_sfnt_off00007b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B33 11384 bytes
SHA-256: 8fad56485eba1c3ec89bd27da09e7ce66dba17b6538048af3233b3bdf5f573dc

Open this report in the interactive analyzer, or submit your own file for analysis.