Malicious PDF — malware analysis report

Static analysis result for SHA-256 453ec487e31a98b0…

MALICIOUS

PDF

58.3 KB Created: 2020-10-28 22:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 29b114cb69bf916d6315a93337ee56e8 SHA-1: e19e347df0756c3db4ff203b0adff3b16ad23e3f SHA-256: 453ec487e31a98b0e179aa57b9b04d2c74a24a6eb26f9a2ea2890829899fbc41
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL, 'https://ttraff.me/123?keyword=trinity+bank+dothan+al+login', is presented as a bank login page, suggesting a phishing attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=trinity+bank+dothan+al+login In PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/xenojefomil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f87d90421aa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5f8dd86ece4db.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/2047907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388626/normal_5f95cca4011d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f881939ee565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f990502d118d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f9932f427185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_5f9702e65d43b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_5f92092b928b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f8b72e6e84e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f91d45ae4e3e.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.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://s3.amazonaws.com/susopuzupure/mathematical_analysis_for_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/basic_knowledge_of_civil_engineering_for_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8234/5376/files/wilko_chardonnay_wine_starter_kit_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/penicillin_cephalosporin_cross_reactivity_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7926/2912/files/elements_of_cartography_book.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69D0 5928 bytes
SHA-256: c4a985e615b4553e8e9c484eed8f82559120cc2bb3d8303b40887573d99c7ed8
font_01_sfnt_off00007e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E16 4836 bytes
SHA-256: 840f9c909064c054a28be9220fe1a812b457d2c47d63a42af04ae6d51734b9ac
font_02_sfnt_off00008e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E73 11436 bytes
SHA-256: 50af847db2feb3300034b9a9c001728b20dfb8177d319e0cba55e5349b478896
font_03_sfnt_off0000b5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C8 16384 bytes
SHA-256: d4b15fc8a7e549cc2fb284ade89d2d94b0330b4ae270b0dc7de4d058741e0b64
font_04_sfnt_off0000cb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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