Malicious PDF — malware analysis report

Static analysis result for SHA-256 77454262d7de0a36…

MALICIOUS

PDF

48.8 KB Created: 2020-08-22 01:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba1814524280e7ab421287bc224e01e SHA-1: 54c37cc7660ed468e9516508a795cf302c00b58d SHA-256: 77454262d7de0a36ca2b9ead6421774646147b8a929921be8f9c1cc08d065149
154 Risk Score

Malware Insights

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

The PDF contains embedded links and a document body that references 'Deferred tax payable balance sheet', suggesting a lure. A critical heuristic identified links to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.com/pify?keyword=deferred+tax+payable+balance+sheet'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of a phishing or malware distribution attempt.

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=deferred+tax+payable+balance+sheet
    • http://files.chaosdragonboats.com/uploads/1/3/0/7/130739247/73a7d89a4eb250b.pdf
    • http://files.malenyartscouncil.com/uploads/1/3/0/7/130776054/8734955.pdf
    • http://vajebabal.bcpreventionnetwork.com/uploads/1/3/1/6/131637562/3e0e2eff2a93.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/disovarenogise.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/adobe_cc_cleaner_tool.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/tugononodunesitowexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2873/3352/files/project_planning_and_budgeting.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/fibalelosefuxusoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9319/files/kibilekenisagirete.pdf
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/curso_completo_de_apicultura_georges_de_layens.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/the_way_we_were_barbra_streisand.pdf
    • https://cdn.shopify.com/s/files/1/0433/3522/1403/files/302_440_8210.pdf
    • https://cdn.shopify.com/s/files/1/0456/8471/9775/files/janiwet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/95268313340.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/iso_14001_internal_audit_report_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074c6.bin
63b66465902a11ea100a1a69206fbd9aa4e964edf42376dad9dd7117f0be6256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C6 5552 bytes
font_01_sfnt_off000087a5.bin
c6a7b1b8ec150b8a6ea785828c854c9ab71b73f99e403eebe368ca4b85e2cfb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A5 14800 bytes

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