Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49c94900d39d70b…

MALICIOUS

PDF

45.5 KB Created: 2020-08-28 14:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10a23d751303625735999ddf8be4f772 SHA-1: 9b1329c7ff0bad6277086883a903e5387cdd1ec5 SHA-256: e49c94900d39d70b21809c3ae285cf32124b28568bc866d5687e0576a639386d
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text, though partially garbled, includes the URL 'https://ttraff.cc/pify?keyword=simplification+and+approximation+pdf+for+ibps', which is flagged as a malicious redirector. The presence of a large link farm suggests an attempt to manipulate SEO or distribute malicious content through seemingly benign 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.cc/pify?keyword=simplification+and+approximation+pdf+for+ibps
    • http://files.zerrabueg.com/uploads/1/3/1/3/131384468/7914575.pdf
    • http://files.mckenzieriverart.com/uploads/1/3/1/8/131856234/1440115.pdf
    • http://files.altamonteab.org/uploads/1/3/0/8/130814859/vewuvisom.pdf
    • http://files.kevinanthonyhull.com/uploads/1/3/0/8/130813730/bcab068.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/cambium_pmp_450i_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/22621752772.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12339474235.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/xutozexuzopi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/10830527032.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/12021345192.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1333/files/ipcc_auditing_standards_notes_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/dyned_records_manager_indir_2018.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/xajejalu.pdf
    • https://cdn.shopify.com/s/files/1/0460/3743/4532/files/keyword_planner_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/tubiwirugavalu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/suzuki_sidekick_manual.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006535.bin
ee2f6ca21021f2b2657296306c8f6726d39fa4ab9a8c1e100d663e903b893ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6535 5284 bytes
font_01_sfnt_off000076ef.bin
679c2189b45257a985efc80054af9f4751278afa1592981b5b891c1058a33ce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 10428 bytes
font_02_sfnt_off00009a5f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 4324 bytes

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