Malicious PDF — malware analysis report

Static analysis result for SHA-256 930deead9a7748fb…

MALICIOUS

PDF

72.6 KB Created: 2021-01-13 08:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ef137993b04928ea588708b44f1c8eb1 SHA-1: fd2f092f8bb0d22b6302033eb4d37bc5f50786a4 SHA-256: 930deead9a7748fbae3267678a1078c79bde9c37e5f8cc38083564417212d5d4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous embedded URLs that point to a link farm hosted on disposable infrastructure. The primary URL, 'https://gettraff.ru/123?utm_term=peppered+moth+simulation+answer+key+pdf', is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?utm_term=peppered+moth+simulation+answer+key+pdf In PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/31a0875938.pdfIn PDF document text
    • https://site-1171132.mozfiles.com/files/1171132/blockchain_wallet_download_app_download.pdfIn PDF document text
    • https://site-1166597.mozfiles.com/files/1166597/octopus_watch_charger.pdfIn PDF document text
    • https://site-1227582.mozfiles.com/files/1227582/82489007004.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/bhangra_in_pain_video_hd.pdfIn PDF document text
    • https://site-1166656.mozfiles.com/files/1166656/train_driver_group_bourdon_test.pdfIn PDF document text
    • https://site-1177462.mozfiles.com/files/1177462/morphite_switch_test.pdfIn PDF document text
    • https://site-1178770.mozfiles.com/files/1178770/lilunebef.pdfIn PDF document text
    • https://site-1175777.mozfiles.com/files/1175777/amazing_facts_in_us_history_answer_key.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/3046925.pdfIn PDF document text
    • https://site-1178662.mozfiles.com/files/1178662/open_workbook_and_sheet_vba.pdfIn PDF document text
    • https://cdn.sqhk.co/kujusiru/jhcTCjh/photo_editor-_app_picture_art.pdfIn PDF document text
    • https://site-1208723.mozfiles.com/files/1208723/one_day_per_page_calendar_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD194 5420 bytes
SHA-256: 321fa4b3d9b4ea5cd873126eb282de5c6ce5b456482bfad24368831c90284435
font_01_sfnt_off0000e3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EA 10364 bytes
SHA-256: e6abc77aba1b31e4e73fa77fb2133330cf010671f4d14ae2d56cb35040895ca4
font_02_sfnt_off0001075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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