Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b334e165003d51…

MALICIOUS

PDF

75.7 KB Created: 2020-10-31 02:10:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 57b3bda204a93583be55428a95787f82 SHA-1: 2f55e46fff40efc8f23122986275b97b43aab508 SHA-256: 47b334e165003d512ce541b5a52c19f0701099c3d60643c04418ae9409c299fe
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector URL (ggtraff.ru). The document body, though heavily obfuscated, contains text that appears to be a lure for a tutorial. The presence of numerous external PDF links, many hosted on S3, suggests a link farm or redirection scheme designed to obscure the ultimate destination.

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://ggtraff.ru/strik?keyword=r+xts+tutorial In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f9c103a47142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f95a4604e2c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_5f9332018176f.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/xanebavifamopez/124420068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7e5954-652c-47c5-b596-868e87a043cf/casement_window_ac_adapter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/55057626213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a9e8fd-1e99-4a08-974b-d7e2d9516dd6/kelapakepeli.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/reverse_tire_size_lookup.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/borderline_personality_disorder_demystified_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d44dbd-cc1f-4a58-b03b-e64b1442d7cc/49288497818.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/53571226581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2589/9426/files/safaxexigonosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008a2eed-c25c-423b-8176-98b2d4a91cd7/descargar_pokemon_soul_silver_en_espaol_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/jalivimebebejizitoniza.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_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 4752 bytes
SHA-256: aef811a48dbdcc4e5106631847f1c6f99dffb766ce17e09f1619e2fb4af6f66b
font_01_sfnt_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 11396 bytes
SHA-256: 9a173bfcc2c092728e8372ee3ff5a6c225463679be8b0eca809497dd8a3e66f7

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