Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e6baca6fa13db6…

MALICIOUS

PDF

62.9 KB Created: 2020-10-01 01:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5f17ccd8b7d3a0b2bedce2f4e4a34177 SHA-1: e68c61908faaef417141d32279de1a4a4a1b3b6d SHA-256: 43e6baca6fa13db685d3e3a69524cf918ae12df6bd9b6022988967af03d63089
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to mimic search results, with one prominent link leading to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. This suggests a phishing or scam attempt to redirect users to malicious sites.

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=apache+spark+2+book+pdf In PDF document text
    • http://zupumene.eriepoloniahistory.com/uploads/1/3/2/3/132302915/novotazupogunizelu.pdfIn PDF document text
    • http://files.essanceofafemale.com/uploads/1/3/0/7/130738548/boxavubevonaz.pdfIn PDF document text
    • http://files.bettylous.com/uploads/1/3/0/7/130774965/8034244.pdfIn PDF document text
    • http://files.brackstonebuilders.com/uploads/1/3/2/6/132681336/dezun_woveselub.pdfIn PDF document text
    • https://site-1039275.mozfiles.com/files/1039275/58531672931.pdfIn PDF document text
    • https://site-1036929.mozfiles.com/files/1036929/18353304788.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b69d1a27-2424-4adb-9514-c37cd6e97414/genezejarivubinigikove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ed52c1-2af5-41b3-a05a-d55d6f739089/kamuretekikosewetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/ejercicios_resueltos_de_arreglos_en_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/walter_benjamin_kafka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/55961829336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4380/7654/files/diagnosis_of_ankylosing_spondylitis.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_off0000b79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB79B 5536 bytes
SHA-256: 9c4d23549a159f5cf791fad0c7f1106c084a61d79b2b3916bc1033e04b92eb13
font_01_sfnt_off0000ca63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA63 10880 bytes
SHA-256: 0a3045b9e64251889f92027b9048a3b3b48acf16df6822c67c1022c24b00a09d

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