Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07a983015b15284…

MALICIOUS

PDF

36.9 KB Created: 2020-08-12 13:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3697af010389c7a6ac65763312ab48c SHA-1: 8bcb46c1f037c8c87f642667a18313ad3bea20b8 SHA-256: f07a983015b15284ae09410c568c5a2fc9ca26b38cfc6424580a94941ced7875
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wb?keyword=braunability%20wheelchair%20lift%20manual, which is likely intended to lure the user to a malicious site. The presence of a large number of external PDF links also suggests a link farm for SEO manipulation or traffic redirection.

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/wb?keyword=braunability%20wheelchair%20lift%20manual
    • http://files.karencannon.net/uploads/1/3/2/6/132681476/1628952.pdf
    • http://files.tfgministries.org/uploads/1/3/0/7/130775732/9633335.pdf
    • http://files.newworkingworld.com/uploads/1/3/0/8/130814229/noxidutinasudiwop.pdf
    • http://bibami.kurmconsulting.com/uploads/1/3/1/4/131453501/mefopemewegebi.pdf
    • http://likemimim.thicketblog.com/uploads/1/3/1/6/131606289/roreza.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/puwuxoliginegogibepude.pdf
    • https://cdn.shopify.com/s/files/1/0437/5982/9149/files/69108478892.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/xugorifiterogiturem.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/48442949874.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/google_chrome_extension_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/59934602124.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/truck_transporter_game.pdf
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/neravaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/86138761885.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/pdf_files_download_search.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/jalufanosijafolupuvofiwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/taruwujuvigumiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9839/files/kewupavukejudorelebi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052dc.bin
7d2664e268f64e03747125546d815f638332044fbbe02151ccdbec51ea2e66a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52DC 5328 bytes
font_01_sfnt_off000064e3.bin
11b013f6a07a379b8e8a63973343c75e2cdadc0698e53a1a813203957a67c862		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 9820 bytes

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