Malicious PDF — malware analysis report

Static analysis result for SHA-256 d365409fced10ca7…

MALICIOUS

PDF

40.9 KB Created: 2020-11-04 09:51:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38049f84c21b772f99b9c16ee4f6c357 SHA-1: 75de3dca133ed0913bf33cbb4b6e954796241fa0 SHA-256: d365409fced10ca7276e03dabeece03ca87eeed79e1ccd5a8e341c4b22398d6d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/aws?keyword=henkle+middle+school+wa', is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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://cctraff.ru/aws?keyword=henkle+middle+school+wa
    • https://cdn-cms.f-static.net/uploads/4422390/normal_5f9b77971e6fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zetare/feruzuviletezisupula.pdf
    • https://s3.amazonaws.com/wisuw/apnoea_test.pdf
    • https://uploads.strikinglycdn.com/files/a67c756c-fc61-46f1-bf0a-20402994ad29/bilanuvuxesila.pdf
    • https://uploads.strikinglycdn.com/files/3cb5aac1-b8b8-4219-8042-22139cf288fc/ti-_84_low_battery_warning.pdf
    • https://s3.amazonaws.com/fejatepudopito/radugabiluximonebifemuk.pdf
    • https://uploads.strikinglycdn.com/files/b0a135a7-0132-4e5d-9d38-21ed674effd4/read_the_exiled_queen_online_free.pdf
    • https://uploads.strikinglycdn.com/files/2c09406e-9c4e-4904-909a-181357074985/gopusidiravasezenoli.pdf
    • https://uploads.strikinglycdn.com/files/0a1a4a0c-c065-404d-a0da-5ac81b7c45f1/29614933515.pdf
    • https://uploads.strikinglycdn.com/files/69290b7c-0a15-421e-b826-032989e78c61/zupevagixepafisorulanow.pdf
    • https://uploads.strikinglycdn.com/files/4ae964e0-639c-4539-a8d1-b9e625168bb2/wapinurag.pdf
    • https://uploads.strikinglycdn.com/files/e8e3d439-dcae-4858-bca6-3cd52661456f/jodobazilokuden.pdf
    • https://s3.amazonaws.com/sorogamat/portal_gun_mod_minecraft.pdf
    • https://uploads.strikinglycdn.com/files/065479f8-5112-412f-a013-4e9f056c71e2/lego_city_undercover_100_guide_albatross_island.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_off00006246.bin
9c8fc510b750fd386f0bb610f7f46e3078b53411f1a651e0e090609d2f3e94cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 5200 bytes
font_01_sfnt_off000073e3.bin
c283f947444250b5c289d32fb2193fabeb4304ab39a5899ddb66106420e576cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 10372 bytes