Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b56307bd925f527…

MALICIOUS

PDF

47.3 KB Created: 2020-08-13 06:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05be14b99050b01dd570d63e93ec3ef5 SHA-1: 7500002183b59f84ea245222ba5e3c65d9f96116 SHA-256: 6b56307bd925f527f594c1e1b27e0d814ce5ec78d8eafe7e345cc1b604b7bf81
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting an attempt to lure users to malicious content. The document body, though partially corrupted, contains text related to entrepreneurship and embedded URLs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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/wb?keyword=personal%20qualities%20of%20an%20entrepreneur%20pdf
    • http://pamefa.midlandsfestivalofflight.com/uploads/1/3/1/3/131379578/pofizufadekabut.pdf
    • http://files.valleycycles.co.uk/uploads/1/3/2/8/132814972/9360744.pdf
    • http://pefig.johnnyscustomaddicts.com/uploads/1/3/0/7/130775507/87c7a.pdf
    • http://rixufo.sommerflooring.com/uploads/1/3/0/7/130775823/kenovuba_siruxiz_bisenagagarutag_niruleloji.pdf
    • http://files.yogashak.com/uploads/1/3/0/9/130969910/zevuru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/wosusapasobatonidikamokev.pdf
    • https://cdn.shopify.com/s/files/1/0427/9592/5671/files/jugazawaxi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/60919300581.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/67529438728.pdf
    • https://cdn.shopify.com/s/files/1/0436/0182/1859/files/jufogedanatusim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3710/files/bank_po_exam_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/arihant_encyclopedia_of_general_science_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/light_geometric_optics.pdf
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/darodososozik.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/45023259081.pdf
    • https://cdn.shopify.com/s/files/1/0451/3467/6133/files/html_to_library_javascript.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_off00006e84.bin
1c2ab9b0b00714c7f8d09ca1241b776de95350bae6ebc9a9b95331bc0d9ddf0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 5044 bytes
font_01_sfnt_off00007fab.bin
e9a48c854cfba1949ed075307fd96265038decea415da752a18ce5ad09ebc0fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAB 10016 bytes
font_02_sfnt_off0000a1ec.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1EC 4324 bytes

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