Malicious PDF — malware analysis report

Static analysis result for SHA-256 7190ced6834124ed…

MALICIOUS

PDF

44.6 KB Created: 2020-08-15 16:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1336a5d8431facf45539be77e6f3d711 SHA-1: 6b2672cbafcac4b80b0772fe1664057f1f0456e7 SHA-256: 7190ced6834124ed2447497da85c8ca93ee9f296ade1ee1c6f6f39b26a1a197b
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to sheet music and the authoring application, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely to host a phishing or malware download page.

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.com/pify?keyword=liszt+paganini+la+campanella+sheet+music
    • http://files.lifeintheglow.com/uploads/1/3/1/4/131409210/40f4b0478a3aed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/80072200584.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/79313885813.pdf
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/vuveja.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/undang_undang_dasar_1945_amandemen_ke_4.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/59192081807.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/14732945484.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/nimoluxitejovofifavovugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6735074847.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9970/8821/files/31183731075.pdf
    • https://cdn.shopify.com/s/files/1/0451/3175/9769/files/science_and_synthesis_of_nanomaterials.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/pojiner.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050aa.bin
fb67e8b2ebbc859caa47734c79d1a5b0bbdc751e616908631fdf152ba05e6ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AA 5240 bytes
font_01_sfnt_off0000625c.bin
63b9a6edc7e45d265e0749ae775c13bb7b69aff98ec12fe22dc8697c94cc9181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 14816 bytes
font_02_sfnt_off0000906f.bin
15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906F 16120 bytes

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