Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b8d435f9146347…

MALICIOUS

PDF

51.8 KB Created: 2020-10-29 13:56:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2390ae4d18b784b164443c39181eef58 SHA-1: 9289feba4eee527fa3a1edb3f03b5c65f83bafc7 SHA-256: c2b8d435f91463472b7dc903905ac66132e197b35846a27ac4349f8b086d3915
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to the malicious URL https://ggtraff.ru/aws?keyword=teleny+pdf+espa%25C3%25B1ol. This behavior, combined with the ML classifier flagging the document, strongly suggests a malicious intent to lure the user to a compromised site. The document body itself is heavily obfuscated and contains the malicious URL, further supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/aws?keyword=teleny+pdf+espa%25C3%25B1ol In PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/lemebakagur.pdfIn PDF document text
    • https://dikoriwapajok.weebly.com/uploads/1/3/4/4/134447187/wazamobevez-lakodoko-vixomekugivojep.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/6e208a5c1c38d.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/bugosukaso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f8f7504b5ac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f95699a7cdfe.pdfIn PDF document text
    • https://merebidoso.weebly.com/uploads/1/3/4/3/134344951/c1f58973fe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f8db7864af9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f902d951aed0.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
    • https://s3.amazonaws.com/mijedusovineti/anxiety_definition_journal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd777045-ef04-4ad8-87e2-6b8af8ee3262/50081195677.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/java_spring_annotations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/what_is_tor_control_port.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45081da-86c1-439e-bcb9-3a69ff8350ac/64076455463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93b4bc7-9262-41d7-a3ec-7fd1331f280f/l2walker_2.19_english_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14894b27-4a62-4b26-aec8-864173fecf0d/zigasefezur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3581/1989/files/segitafovofokewut.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/lego_star_wars_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f8e514-2159-4561-9765-40051b7e9647/draconian_ritual_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/punctuation_worksheets_grade_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc0cd41-752c-4164-846b-bd0b965162bf/me_fir_bhi_tumko_chahunga_song_downl.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/algebra_math_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee11af3-8bb4-4baf-badc-6ea277c1e66a/tudanufuwukozaloxizelom.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 2864 bytes
SHA-256: 3c6413ece59eead5f5195ad6f866d9011a1f0120553e5b43acb32bb1e7f4b91f
font_01_sfnt_off00007df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF9 4864 bytes
SHA-256: a6b907cdaf726fde5d80bc3054e33ff25d3653d3747d0ff797b67f2798e46e33
font_02_sfnt_off00008e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E53 10620 bytes
SHA-256: 8a12f12853f37d624c561ad655daeffbedf8e3384a5dbb1388635055e73910de
font_03_sfnt_off0000b1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3