Malicious PDF — malware analysis report

Static analysis result for SHA-256 439ef0203fdcee41…

MALICIOUS

PDF

75.8 KB Created: 2020-12-13 18:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 35448683301a55621825808491c7cbf3 SHA-1: 1bf0278a49524a87a37ca1c61fa7b1fac0b90374 SHA-256: 439ef0203fdcee41980d400f9ea8b1c3869b39b7bd8d5c6daf8cddc8a6e48f2e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely part of a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to a search query, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=waltham+watch+company+address PDF link annotation
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/9237000.pdfIn PDF document text
    • https://sezemizom.weebly.com/uploads/1/3/4/6/134622585/mepukikeborugisaxati.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/0ab2be95-88b4-438b-9f56-daf06dfb983e/xerifuxoluvidajexamageki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8499c37-0ee8-4f27-855b-74d7c55af3e2/motemosaletir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e9ea982-10b5-49db-81fc-f50d13908cd0/ap_government_and_politics_chapter_11_outline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19502197-b04e-4de5-9a73-d174bdc379f8/73277008889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6bf55e-c3ee-43f4-9063-5d4d3582d4c1/75660875948.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3c939bd14ff0dd2ae97c9/t/5fcb5f7b7ab0f364abab334e/1607163772749/queen_of_spades_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/what_is_form_it_204.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3703b8ef7301f8b20f9e5/t/5fcefe18caa95a391e634cfe/1607400984898/repomoseta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1da445e-b18a-4471-b8be-8c7bf425b41c/how_to_measure_cloud_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/sql_tutorial_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03daaa6e-1b4c-452a-93bc-844a3c48cd74/vinivofebapukikadarifaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f94d6e4-c18f-4964-997c-848c2c796898/the_asterisk_war_season_3_release_date_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d69576-f380-4265-b487-1607fe640ee6/turuvagataluremebot.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_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 5520 bytes
SHA-256: b01ef8b2305d37e900fbb0297368b356516185f22eecf4c9efe202ab2ae07595
font_01_sfnt_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 11000 bytes
SHA-256: 50d42ee2fa1abc00943b6602eeec2d7542dfc8b1343d0f2621492c003802cfea

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