Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf65d94e579b00d1…

MALICIOUS

PDF

35.3 KB Created: 2020-11-03 22:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf55df5c801e2626bf2af9d52635efb9 SHA-1: 254e4490ff253a4af0c37af457ef5a1c05dc305f SHA-256: cf65d94e579b00d1d08399ff285c6a79052fdfb5847fa5e74ec0e07c5cb1b9d7
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.me/123?keyword=online+onion+root+tip+mitosis+lab+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_5fa1530809a4f.pdfIn PDF document text
    • https://bijivabaj.weebly.com/uploads/1/3/4/6/134601785/negejefiki.pdfIn PDF document text
    • https://jikiwifapa.weebly.com/uploads/1/3/4/3/134338998/99fd9fc28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f8d00d782b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_5f97c28060c23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53c426f5-a3ea-484e-b736-738af4b49119/lepelokadujuwugorezarej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7cf0fc7-04e9-4468-9f87-d33664582b58/sufijamufaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e99a13a7-2cda-4b89-9261-c8fad0aa92f2/poxal.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/tejupurufezon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c36f3b9c-a224-45bd-a233-6249a330e6c1/bis_certificate_full_form_in_customs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3398770e-ff8b-49df-8245-7225053ad37a/c195_kodak_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48bc2e5f-d79a-42e9-8930-10025a8d4d54/93780468598.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_off00004d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2D 5224 bytes
SHA-256: fbe923c92c4cea36ee7e228b14888d5cb5ef2b13ac5523ebcd4457b52de7436e
font_01_sfnt_off00005edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 9824 bytes
SHA-256: 92f02a017323a526654de7dc7a72369ffcbb845afd33135ea6f90a006b2507c1