Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f52de96a6452cc…

MALICIOUS

PDF

61.1 KB Created: 2020-10-28 23:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 2656ac5e98ecff5a2ec414ae99241066 SHA-1: 1b0c427840aa778e755b7ee01adb525fdc20cde2 SHA-256: a3f52de96a6452cc7df5b3749933b6d775f0e5fdee5db5c80ce71a4c4380d5bb
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?keyword=volume+vs+temperature+graph+ideal+gas'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware download. The document body contains garbled text and the malicious URL, suggesting it's designed to obscure its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/aws?keyword=volume+vs+temperature+graph+ideal+gas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f89bd64a00e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389582/normal_5f93158c15e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f8e2216011e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5f8e16ce99e6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f870ffb61007.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/54fd334f-7fa9-4d55-846e-f5331bbc095e/mokuvijilofijibuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a671016-ae82-4997-b8a2-e606a8e4e701/91346462433.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e970ec93-de76-40fb-ab28-5a48978e9251/47118614365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e30be6e-330d-4446-865c-7b515830aea8/formato_carta_responsiva_automovil_utilitario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ec684d-51be-4507-9bdd-afd0d497ebf3/wakavasuxoludaxudafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f50542-31cf-4cf6-8248-7bca736acbdb/samurai_and_knight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffee4fc-18ef-4194-9024-8bb5bfd650b4/mapas_mudos_europa_para_imprimir_tamao_a4.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/first_aid_treatment_for_burns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d64fd63-6dc0-41ba-bab1-3b115cafe60c/37966280832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249715a2-dbe1-493c-b8ad-a631515b1b94/nozusupudefeku.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/22852204808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b12d7a0-91fa-4ec7-8099-5b358f981be2/mafinisazakirevebimome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c517ad-9c95-4790-b0db-711ca7182c3b/gulovifewukuwabil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1560788-292f-442b-aa53-e2a3e5f2ecb5/dagunizitusazedejav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e5865c-5fcd-4a2f-bd8f-4600889a824b/gugadixud.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/proyecto_arquitectonico_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b53b1e-c4ec-4836-b7bf-237bfa44e54d/paroles_nougaro_tu_verras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b4cc629-63cc-4309-84c8-028bcc60b76e/45075238875.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD1 8440 bytes
SHA-256: 8c2e8c5f8a5e45503cf76c5d7504ecda55a1885b371c360d595e8db30cc81388
font_01_sfnt_off00009800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9800 5400 bytes
SHA-256: 978434d832f7bdf642a89c5b86eabed96693e19fdd795e27ef9bf1dee7431758
font_02_sfnt_off0000aa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA37 11224 bytes
SHA-256: a4e984a0bb17fd8ba20107c1070878bf2810de01f75462ddfadfca1caf467143
font_03_sfnt_off0000d069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD069 16192 bytes
SHA-256: 74a35dcac671789a1952909c7064e8f0092ccf84988030a41650584fa1b75142