Malicious PDF — malware analysis report

Static analysis result for SHA-256 1985dbddf924ac8c…

MALICIOUS

PDF

61.9 KB Created: 2020-08-14 11:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a58e8bb67b9932312ab17770c0bd72 SHA-1: db4615ca52b787e44ff0a3756ffc9a4efd5bc8bf SHA-256: 1985dbddf924ac8cdc8a1861196af334a205acdbcbefecf72d0f32ef2a9d980c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure to install a browser extension or update, a common social engineering tactic. It also includes a link to a known malicious redirector, ttraff.cc, which is likely used to host or redirect to malicious payloads. The document's structure suggests it's part of a link farm designed to distribute malicious content.

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.cc/pify?keyword=keyboarding+practice+worksheets
    • http://lenoru.peeblesfootball.com/uploads/1/3/0/7/130775732/fiwozu.pdf
    • http://galano.manchestercitytantricmassage.com/uploads/1/3/0/9/130969356/d779f473aa5be.pdf
    • http://files.millcreekbrangus.com/uploads/1/3/1/8/131856852/robatatabuvub_bemabat_fokube_wiwirurifiz.pdf
    • http://files.sccliteracyproject.org/uploads/1/3/2/7/132740445/navotudelevu.pdf
    • http://files.mainesouthmusicboosters.org/uploads/1/3/0/8/130813269/mobenipajodinen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/xipetijofixoxuvibavufub.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7972/files/lafalobogamepegubowad.pdf
    • https://cdn.shopify.com/s/files/1/0433/8283/3308/files/66180688191.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/poxusulijupidokubeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/xaviregomudu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4459/9958/files/example_of_simile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78394199391.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/mufadatizejebaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5177/8202/files/nesedilabomebibisewoti.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/migetorefuzixoratufona.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_off0000b394.bin
3adfaa8e75c8f08e4eb36fda7d8994161779e023c4eee4a10ce98fd64ef0f23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB394 5672 bytes
font_01_sfnt_off0000c6e6.bin
105b4fa5da3792d903f2bb7836f8052ad2963a8b43a670b55565bb0720184a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E6 10388 bytes

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