Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31287327238036b…

MALICIOUS

PDF

55.8 KB Created: 2020-10-30 09:38:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 07ded318c2d9151ae5428e60a31147d3 SHA-1: d614e582825779f279e22e3bce12847df6d49d90 SHA-256: a31287327238036be93871e9aa5f71be57193d51f531df3ea42df68d5ec696c2
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier as malicious and contains a link to known malicious redirector infrastructure. The embedded URL, https://cctraff.ru/aws?keyword=temperate+grassland+ecological+concerns, is the primary indicator of malicious intent, likely leading to a further stage of attack.

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=temperate+grassland+ecological+concerns In PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/mofaxajufad-leren-fujunuxoguzel.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/1c489150-b64e-4048-b743-b12d18606d60/tabamuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1664/9376/files/alexander_who_used_to_be_rich_last_sunday_reading_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a304a6-6cd9-48ba-bb87-588efb9846fd/2005_corolla_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6df79e8-31e7-4a0e-9740-33eb452e8612/xasulabukarizexufev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5535/2481/files/epic_games_android_support.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6522/5628/files/79958733726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1995472a-8c63-4b75-acf8-a27320bb2b2c/sawowoxusagovafupikezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5559/4658/files/zaribimosuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda7bf54-5b4f-403a-a474-fa13775ce52c/49573750546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1773/0713/files/rotomagab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/5080/0542/files/es_file_explorer_download_appsapk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/9971/5264/files/puzzles_and_dragons_guide_2020.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_off00009b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B67 5340 bytes
SHA-256: 9d6759d6967e4d6afa3517271ff7c11b29786eca3fb8c63a29e0772a31f4f3e7
font_01_sfnt_off0000ad79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD79 10976 bytes
SHA-256: 5401570c7bbbbff1322da8d65afbe07e2b67a9a6240bea0dca40293c188d606c

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