Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dff1761e345b47…

MALICIOUS

PDF

32.9 KB Created: 2020-11-02 10:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db3b0a44a4dd4d8c9063c5df93481c87 SHA-1: 1ebf253caa9be67259ae7cb9aea64cffbe1ba7d6 SHA-256: 38dff1761e345b470403ec3b3fbedd639fb8f0c8fb1eb14ff0a55f4bf893b62c
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a manual for a framing nailer. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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.cc/123?keyword=numax+framing+nailer+manual
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/davad.pdf
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5f92cbf93751b.pdf
    • https://kanolapegagidil.weebly.com/uploads/1/3/4/3/134339460/3215561.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/1873605.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bugutaj/lijipoxurinutakeda.pdf
    • https://uploads.strikinglycdn.com/files/700a8855-8424-40be-a149-092d86bdb75a/87068386540.pdf
    • https://s3.amazonaws.com/zuxadol/strength_of_materials_diploma_notes.pdf
    • https://s3.amazonaws.com/dovulavavo/tabla_de_caracteres_ascii_completa.pdf
    • https://cdn.shopify.com/s/files/1/0486/8997/1350/files/the_canterbury_tales_prologue_study_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0266/9084/6902/files/engineering_mechanics_formula_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0505/8353/5781/files/fran_bow_chapter_2_1.0.5_apk.pdf
    • https://s3.amazonaws.com/rijaliwiguvex/fugejubadutufe.pdf
    • https://s3.amazonaws.com/pasawexawinogad/panasonic_viera_42_plasma_tv_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000466c.bin
3b532912b26b251e38f5d9039ae6508623489734db0156f5eb9f41cb4501a9c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x466C 4944 bytes
font_01_sfnt_off00005732.bin
68aecda5c76a17ee3deb30af893801ad764e8f3a5c99547944720190f4888b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5732 9312 bytes

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