Malicious PDF — malware analysis report

Static analysis result for SHA-256 003caa4c6c47f1d2…

MALICIOUS

PDF

61.9 KB Created: 2020-08-22 05:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff59b7a98b4af4093ffae2b08ca602cc SHA-1: ab32018498835c92ab14c82e1d7072cf37649a83 SHA-256: 003caa4c6c47f1d208f006c6df293e8cb413612a5ebf077cf3d16670916c7ce4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cateterismo cardiaco izquierdo pdf' and includes the malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages. The presence of a link farm further indicates an attempt to distribute malicious links.

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=cateterismo+cardiaco+izquierdo+pdf
    • http://sugexez.openthedoorleadership.com/uploads/1/3/1/4/131453558/dadixexoxovore_zezax_zigitetob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/auditor_report_of_apple_company.pdf
    • https://cdn.shopify.com/s/files/1/0432/4196/3679/files/dutagapene.pdf
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/fiderobemefinevox.pdf
    • https://cdn.shopify.com/s/files/1/0428/3439/5295/files/amazing_grace_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/platform_technology_in_pharmaceutical_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0455/6816/4005/files/geligubol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/bumusosesojubeloga.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/29351365873.pdf
    • https://cdn.shopify.com/s/files/1/0434/1396/2919/files/amphibians_classification.pdf
    • https://cdn.shopify.com/s/files/1/0431/3094/5693/files/kuzobitukina.pdf
    • https://cdn.shopify.com/s/files/1/0432/7260/1756/files/11407444387.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ea6.bin
5d37a4dc6490ea411645d29d74f269445d9ec38f32473ac1bda799feb40ea2e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA6 5244 bytes
font_01_sfnt_off0000b08a.bin
17623e48f24ed1bbcbed09e351e3e9e694ac5cc7296137755c806000be53004d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB08A 14036 bytes
font_02_sfnt_off0000daff.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 4324 bytes