Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34703e027f05b16…

MALICIOUS

PDF

40.7 KB Created: 2020-10-30 15:16:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 94be6152ca7a289c358868fd1da17e22 SHA-1: 06cd50d34b093fbdd228f93f358593efef2dc7bc SHA-256: f34703e027f05b16f9e102000ac74d7153a830f00d6216d85c703bc173c1b6bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Animal Farm' and a URL that appears to be part of a link farm designed to drive traffic to other sites. This suggests a phishing or traffic-generation scheme.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/pify?keyword=animal+farm+boxer+battle+of+cowshed In PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/votawi.pdfIn PDF document text
    • https://lirabofopexile.weebly.com/uploads/1/3/4/3/134356775/c5d77dd4303d993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8769b8234fd.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/faluzotixupi/59526372073.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/cyberpunk_2020_attributes.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/vufotizofugodemuwafimu.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/lafod.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/bsc_1st_year_physics_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/57188168880.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/leadership_styles_books.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/south_pasadena_public_library_ebooks.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/business_communication_full_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/balenib.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/les_panafricanistes.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/writing_academic_english_alice_oshima.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_off0000609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 5552 bytes
SHA-256: eafdc88299d67b2553bc4243b7b86ef08f6c40cbd2ef27175a6e65e40a2f6b9b
font_01_sfnt_off0000735f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735F 10072 bytes
SHA-256: 862a0478e20f9ab38f01480562f9b663206c1ce958f471fa8c31f3a6ed4c530b

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