Malicious PDF — malware analysis report

Static analysis result for SHA-256 69159bcea473575b…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 16:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 548d6f3ef0ad8abc06e7499f5ad5b6fa SHA-1: e0be390d099a6fd724e22872899bc7c9b58852dd SHA-256: 69159bcea473575b73b26168c5af0ed82fc572c455e308ee234ec67a51fb4af8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the URL https://ttraff.com/pify?keyword=homeostasis+worksheet+graph, suggesting a lure to a malicious site. The presence of many external links, including to Shopify, indicates a link farm strategy.

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=homeostasis+worksheet+graph
    • http://zizeraj.meganreneewilson.com/uploads/1/3/0/7/130775350/xegut.pdf
    • http://files.mayhemtheatre.co.uk/uploads/1/3/1/1/131163736/sezesiwaxokax.pdf
    • http://files.townofhorseshoebeachfl.com/uploads/1/3/1/8/131871849/tonafobunasaxuk-lotoxub.pdf
    • http://files.hcs-conference.com/uploads/1/3/2/7/132741029/lozepezerixupuz.pdf
    • http://romifetop.mouselab.org/uploads/1/3/0/8/130874601/7708976.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/96696202208.pdf
    • https://cdn.shopify.com/s/files/1/0462/2585/0519/files/jabepimadaxesubidizexu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6221/files/brahmastra_advanced_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/toon_boom_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/georgia_fishing_game_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/59364770531.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/texafetelotaxejagukexosus.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/xazozag.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/vijenipelixozadisuxojuki.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/agrochemical_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/gulosexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4260/2140/files/alfabeti_dad_visual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/280680.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/fojogobixulebexifit.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_off000061ed.bin
a92c72500f321ccb0bc3da0dee328c8e8ccb351714587ab0bccc767836e8be4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61ED 5316 bytes
font_01_sfnt_off000073f2.bin
22333a44165453ccee5ba3ee7fc3831bc69f4247cef49bf64cfae149f4255151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F2 9432 bytes

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