Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb56644abff10dbe…

MALICIOUS

PDF

41.5 KB Created: 2020-11-04 03:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e415bfec7c71e8d67af20da53cd39953 SHA-1: b97cd6a2b5625d9ba40b89a0a1c8f4529ca6991a SHA-256: bb56644abff10dbecb899254078dce483c5392cac040dbfd3ff3b3f72d5d3e8d
124 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though obfuscated, includes a URL that appears to be a lure for a "toastmaster air fryer instruction manual". The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed for redirection.

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=toastmaster+air+fryer+instruction+manual In PDF document text
    • https://voduzivesaduv.weebly.com/uploads/1/3/4/4/134456438/1445020.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/a7bbaffd1a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f9bdf7750ce7.pdfIn PDF document text
    • https://fixabugodorev.weebly.com/uploads/1/3/1/8/131856934/452711.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/c02036eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f888e91cbbbd.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/bilozosagadawetero.pdfIn PDF document text
    • https://luretazolikaxu.weebly.com/uploads/1/3/4/5/134587875/tiramun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/line_6_m9_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/cbse_class_12_physics_question_paper_2013_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/57581222026.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/graphic_organizer_story_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6855/0039/files/don_t_shoot_the_puppy_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/84996828195.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_off00006375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6375 5080 bytes
SHA-256: 505f76ba32e82b1e0a225e05ff09df58aaa69a186acc73ae47588b688c9f4cb0
font_01_sfnt_off000074b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B1 10792 bytes
SHA-256: 34cd1b6e0dbe68384b7d8128b49930e96a03c9a2154e10be3501c91b35316686

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