Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad1460d7dab9dbf…

MALICIOUS

PDF

42.7 KB Created: 2020-08-30 21:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0caa2667a59609498d95c572205909c SHA-1: 2a9fe1526f9add537ab764f46752ca3818e1ede4 SHA-256: 9ad1460d7dab9dbf44ef39a6fd8904a9a7c19ccb70835700a68f0b4100a079b9
154 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=5+palabras+agudas'. The document also exhibits characteristics of a PDF link farm, embedding numerous links, with the primary one leading to a Shopify-hosted PDF. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a lure to external content, likely to initiate a further stage of attack.

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/wix?keyword=5+palabras+agudas
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/fupudexekifane.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4719/files/73861652707.pdf
    • https://cdn.shopify.com/s/files/1/0445/4576/9636/files/common_russian_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/sri_lalitha_sahasranama_stotram_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/25327012683.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/93037155077.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/indices_worksheet_year_8.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/jidewaxogurenaki.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/regrouper_fichier_pdf_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/83142442765.pdf
    • https://cdn.shopify.com/s/files/1/0433/3204/2920/files/55632277225.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/are_roblox_exploits_safe.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_off00006552.bin
a36e24dc878f3213251df7bdf32e094cdd79a281b12bf9f70d80a661e6d693dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 5296 bytes
font_01_sfnt_off0000774b.bin
7c4ef5052249b6e5dd5a678342a00cff588e3cc3f51ed6abc6c3322da7127657
pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 12176 bytes