Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69531a274672d91…

MALICIOUS

PDF

46.6 KB Created: 2020-10-30 06:01:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e294187e629db626cb4c02a5d4b2424e SHA-1: dc043b8e718d8c6f23e9a97be3958724daeef218 SHA-256: b69531a274672d916b5528a92cfbd135909a5f068a686918c2a01caa07a48d24
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ggtraff.ru/strik?keyword=bernina+sewing+machine+manual+830'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. No scripts were extracted, but the presence of a malicious URL indicates an attempt to lead the user to a harmful site.

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://ggtraff.ru/strik?keyword=bernina+sewing+machine+manual+830 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3283/6768/files/xarelto_starter_pack_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/merikeleba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3974/6979/files/clash_of_clans_town_hall_9_base_layout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f99e4715-f1a8-47f6-8915-7adc8dcaa886/noruxafugiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5043/4211/files/puerperio_cuidados_de_enfermeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a3c84be-4d50-48f3-84a0-13ec0bd83ae7/86279327037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5978/7929/files/code_geass_cornelia_voice_actor.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/bikedujesodoxoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e29ac5fa-a9f9-4077-bccf-066c9ec9351f/57392715372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08a2836-2762-4823-bd20-bd90bdbacbe9/vokuwabulatotemasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0646/6497/files/zg_survival_cheats.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_off00007534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7534 5856 bytes
SHA-256: c02861bd3822b04dab5941ce9376da07f3786766ddb721f7c76322ac76f7200d
font_01_sfnt_off00008905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8905 11160 bytes
SHA-256: 276a0689ced415227d2c9b02db3559eae92eefe618e3c0101f2c03de50bc71d3