Malicious PDF — malware analysis report

Static analysis result for SHA-256 17bf94763e248ef4…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 01:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed32c712220089cc81b93e5a15367050 SHA-1: 322ae5cd9e0d2ed6c071bef8a2beca6ea43eeea6 SHA-256: 17bf94763e248ef4920369356b00595a6527cbc3641ebe813087ff514347cb70
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially obfuscated, contains text related to an "Arsenal fixture list" and a URL that aligns with the malicious redirector.

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/pify?keyword=arsenal+fixture+list
    • http://bejogovob.codexpolaris.com/uploads/1/3/1/4/131454065/joniwukoxurekevisi.pdf
    • http://nizelaxem.garden-artworks.com/uploads/1/3/0/8/130874368/92b233b296e519.pdf
    • http://files.rshawillustrations.com/uploads/1/3/2/7/132740598/9398528.pdf
    • http://files.lydiaoxley.com/uploads/1/3/0/7/130775261/62bbdb8.pdf
    • http://dekul.artzplatform.com/uploads/1/3/1/8/131856827/piwesapesido-tejemawa-bukazonoriden-kaxezi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/vawixuvogizegejivop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/oxford_bookworms_library_stage_1.pdf
    • https://cdn.shopify.com/s/files/1/0465/1417/6150/files/fisiologia_del_ejercicio_aerobico_y_anaerobico.pdf
    • https://cdn.shopify.com/s/files/1/0436/0041/2835/files/advanced_java_multiple_choice_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/62055312276.pdf
    • https://cdn.shopify.com/s/files/1/0435/7249/4495/files/senanil.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/54332026996.pdf
    • https://cdn.shopify.com/s/files/1/0430/4837/0333/files/bojixor.pdf
    • https://cdn.shopify.com/s/files/1/0447/7786/5367/files/adobe_xd_web_design_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/capsular_staining.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fiwowosilikaragufes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9187/7283/files/sulenusif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/da_2166_8_1_fillable.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fce.bin
e99d862c0b1b6135eb179a4e369e995b292f0fec6ef3fae6853ec08f5c764a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 4820 bytes
font_01_sfnt_off0000703e.bin
f3b142e7f71eef0ecbb6e4f99a83a50313794d8f6c8c901ef53893267c0465cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703E 10316 bytes

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