Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f30b03b4301db8…

MALICIOUS

PDF

46.9 KB Created: 2020-10-28 00:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9b2a4c7062668223092c3a79b1dcc8c8 SHA-1: d349ff7f16584eb9c2179917a632a82bdaf67776 SHA-256: 41f30b03b4301db8496626096ca9a03fb089c65bb55f35aa90fef074051f1634
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ttraff.ru/123?keyword=the+mortal+immortal+themes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f94435c3017d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5f9581d373d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5f95591a8a937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5f9876082993b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8d980a4a19d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5f954be220287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f873c8d3d51c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f92b6346c295.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/85265968939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/guide_taille_casque_bell_moto_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8182/1088/files/operation_condor_movie_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4510/5045/files/hanzo_the_razor_sword_of_justice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9129/8978/files/kalarowofifigodeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5736/4135/files/pengertian_manajemen_operasional.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/carysil_sink.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/40587234669.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD4 4556 bytes
SHA-256: 71bdb36b1e7f01d8d4e9f08f12a610e2b246b17c551d49746a9897d822f107c8
font_01_sfnt_off00007d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 10368 bytes
SHA-256: fc0ebe28e7e167a326b6f217ba941971bb7bcb4a1f2f7f3837bc2b8cf69662f2
font_02_sfnt_off0000a0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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