Malicious PDF — malware analysis report

Static analysis result for SHA-256 11fead1a7429897b…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 01:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d02b73a0cca750ea89ca21cb7ff90b80 SHA-1: fa705f99fabed560b0b0196da94db61f774fabfa SHA-256: 11fead1a7429897b6732dcd75abd56c938d2b3d03eb8298fd51855b0e6dab74d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains a lure to install a browser extension, a common social engineering tactic for malware delivery or credential harvesting. It embeds numerous links, including one to a known malicious redirector, ttraff.com, which likely serves as a staging point for further malicious activity. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=webpage+to+pdf+converter+chrome+extension
    • http://files.kitchengallerydesign.com/uploads/1/3/2/6/132695633/vasisoxododaxeruzem.pdf
    • http://files.wayinn.com/uploads/1/3/0/8/130874146/3676612.pdf
    • http://files.lifeboxusa.org/uploads/1/3/1/3/131384468/zefutonusa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/16051434016.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/sibawobaxipovifupasos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0221/6093/files/80197044181.pdf
    • https://cdn.shopify.com/s/files/1/0432/9252/4700/files/latajiguzibudewilomemu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5743/7080/files/696982302.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/vuwapelogobimolapukoge.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/19170511541.pdf
    • https://cdn.shopify.com/s/files/1/0439/3179/5624/files/40199275449.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1402562920.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9557/files/19213584215.pdf
    • https://cdn.shopify.com/s/files/1/0430/8303/8874/files/13893009574.pdf
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/77376193729.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/telekinesis_training.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_off0000717f.bin
9c856936763fd256954d1b6b747399058963900fce30b7f36d8265da034fdaf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717F 5816 bytes
font_01_sfnt_off0000853e.bin
46116e92dd98fc74f4d8217d76035a910dbb8e2140344020f4aa714e975cda22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853E 10588 bytes

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