Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c42f74dd0ec242…

MALICIOUS

PDF

46.7 KB Created: 2020-08-24 22:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42e0c85adce7e20d18f1464f623cb83 SHA-1: d4918bf57a5690ce098bf7b94e7aa93a90c09508 SHA-256: 64c42f74dd0ec24263503cfcf2a4d929e6e8fd474fa5ab385abc0b63eb4f9626
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Tomb Raider' and a URL that appears to be part of a link farm designed to attract traffic. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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=tomb+raider+definitive+edition+tomb+guide
    • http://nurovos.southwickchurch.com/uploads/1/3/0/9/130969260/tufisu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0448/9651/8299/files/ravav.pdf
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/wonajosejefib.pdf
    • https://cdn.shopify.com/s/files/1/0433/4898/3959/files/lions_vs_chargers_injury_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/rixugusepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/17426628315.pdf
    • https://cdn.shopify.com/s/files/1/0430/7841/8583/files/rozinor.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/gatafawava.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/rizuwuxawesifewizi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/workforce_planning_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1600/files/19439795277.pdf
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/pufokunixamuputi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7902/4292/files/acidificacion_de_los_oceanos.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_off00006a3d.bin
7c9e875c6592012a7f1d6d3cdd7a3f2e9ebe9ed497b2e76efb0171c6c701f5e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3D 5048 bytes
font_01_sfnt_off00007b53.bin
e4c6e6efc1ace8e3d294c675db1b1b36191df11ceb6f83b67676389baaffebc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 10660 bytes
font_02_sfnt_off00009f7a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F7A 4324 bytes

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