Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ec5148d295c5a8…

MALICIOUS

PDF

62.4 KB Created: 2020-10-30 08:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2f366644e13ff65f25625eba5a202d06 SHA-1: ddead8a7e48a9f7f1578dd485a9fdec879943228 SHA-256: e4ec5148d295c5a854178883e237b4a410d2d9457bd1c590302931ec632b0cae
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.link/123?keyword=highland+hospital+oakland+lab+hours In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f8ab61559aab.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/77c0fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5f926b1d26569.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pefepo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f8d4b75bbeaa.pdfIn PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/famoratepuwumor.pdfIn PDF document text
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/gukunadodi_jefevivovapoker_majufa_bivepepaxokigo.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/duzexefemosaxe/gcvt._org_iti_result_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8112/8897/files/3704116133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/wodetevugajufesadulip.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/potorak.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_off0000b291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB291 5388 bytes
SHA-256: a86cc26b403307ff816ae50e35417dd3f84e895617903f0c42aa7bb1c6f653c6
font_01_sfnt_off0000c4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D3 12424 bytes
SHA-256: 1e6cbbfacc09168614790ead553761bd7828f7f9da50f04b1d3017ec7bc95cd5