Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e18f41a4b2661ce…

MALICIOUS

PDF

34.4 KB Created: 2020-10-29 12:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1c084bfe0913004da274294902a726a0 SHA-1: 9d70f06e8ef688cda59e26152e2e55b2a4fa5202 SHA-256: 3e18f41a4b2661ce397692112ca3f62675b782136d7b351298603e345bdf78b2
174 Risk Score

Malware Insights

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

This PDF document is designed as a lure, presenting itself as a calculator manual but containing a hidden clickable element. The heuristic PDF_IMAGE_LURE indicates it's an image-only document with an action trigger. Crucially, it contains a PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'ggtraff.ru', which is known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests it's part of a larger link farm, with numerous external PDF links, many of which are hosted on Weebly. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this sample.

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 34 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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=ti+84+calculator+manual In PDF document text
    • https://xutetuzaxudekit.weebly.com/uploads/1/3/4/3/134371691/ed8b3238c3ad.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/jolexalijox.pdfIn PDF document text
    • https://vewusijonaw.weebly.com/uploads/1/3/4/4/134489037/2701368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5f96d722adeda.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373248/normal_5f97d754e51b2.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/zaxamagiputijor-wesakavul-kewaz.pdfIn PDF document text
    • https://vawotitalu.weebly.com/uploads/1/3/2/7/132710714/gunina.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/fizusirepo.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/4434775.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/dc660e4.pdfIn PDF document text
    • https://penulikadima.weebly.com/uploads/1/3/1/4/131482887/8869675.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9632/1432/files/defining_relative_clauses_exercises_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7613/4082/files/wivukadigux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5384/9499/files/indefinite_and_reflexive_pronouns_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gavabagovuvofafaniradurel.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/rasesodelibuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3701/0331/files/collocation_with_do_and_make.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/tomejetewomi.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/34014059279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9394/1142/files/vocabulary_workshop_unit_5_answers_level_f.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/xuxipiwovexopizimazigeguf.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_off0000522d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x522D 4996 bytes
SHA-256: 1f5b52abbd00977d670d1e707ac4d7aa09284a0a04f01dc927bb3e1f9f0eadf8
font_01_sfnt_off0000631c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631C 7452 bytes
SHA-256: 778ab9e4de30916d69d658328072916ca19f54384496943604aa9c6d16e308a0

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