Malicious PDF — malware analysis report

Static analysis result for SHA-256 64abc51f1640634e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-20 15:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb820a898c3cd883cd77aa744d24ab02 SHA-1: c17ff37360e873c26d1dde8c417306797a20458c SHA-256: 64abc51f1640634eee00698f35a82e908133ddd7b138a1a6997428fa2cb4c04c
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to malicious content. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document's purpose is to trick the user into installing something harmful, likely to steal credentials or install malware. The embedded URL 'https://ttraff.cc/pify?keyword=ios+beta+13.+1+beta+2' is a known malicious redirector.

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=ios+beta+13.+1+beta+2
    • http://lubosexaf.guamcycling.com/uploads/1/3/1/3/131398575/sefiremivaxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/xuriv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/basic_electronics_by_b._l_theraja.pdf
    • https://cdn.shopify.com/s/files/1/0455/6403/5237/files/vidmate_app_jio_phone_install.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/sda_hymnal_app.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/girigaxavax.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/24909745934.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9839/files/ozonolysis_of_alkynes_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/a._c._a._l._m._e_s._e.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_off000053d8.bin
88b42d5dac00541bfcdff5e53b53b39b81ac521b38e74634165404e1bc068601
pdf-font-stream PDF embedded font (sfnt) at offset 0x53D8 5008 bytes
font_01_sfnt_off000064fa.bin
4f0e694fe99d35d00e58e5831b461d0fd6fcc6c55be3762b80686090d85b95ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x64FA 10084 bytes