Malicious PDF — malware analysis report

Static analysis result for SHA-256 109c23687fbe3807…

MALICIOUS

PDF

93.5 KB Created: 2020-08-03 03:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b36e698b6d6fc27775fa5bd2fc57533 SHA-1: 056db931e1d07010d9a0b8d19b1ec34e7afda15f SHA-256: 109c23687fbe380777c957afea85a5f3de4b8307366794c96fa913eeacb38594
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link and a browser extension installation lure, indicating a social engineering attempt. The embedded URL 'https://ttraff.ru/pify?keyword=black+star+meaning' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to redirect users to 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.ru/pify?keyword=black+star+meaning
    • http://files.blwcenter.org/uploads/1/3/1/0/131070561/d954507.pdf
    • http://files.mountainwesttlod.org/uploads/1/3/1/6/131606631/kerusi.pdf
    • http://files.perthpropertyimprover.com.au/uploads/1/3/0/7/130739027/rumowoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/7017803660.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/59451900106.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/wulejetato.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/84788187220.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/61428746635.pdf
    • https://cdn.shopify.com/s/files/1/0436/9950/3257/files/jafugaxilaviwikuzisinik.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/liloxasojemovomupopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/lamefipeguzejides.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/60690722351.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6511/files/roserivan.pdf
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/digurinejiwebowoduwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3096/2588/files/popimibasosazuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/git_download_remote_branch.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d32.bin
947c2bef0fa2213cf6340aeb91c6bbe6b2d474cd881c85bd241345a92947b517		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D32 5232 bytes
font_01_sfnt_off00012eed.bin
787acaa5d38a03196b562e0c0f1c2e0ce2cbaf8e9ae4565b94f730dda3c0ddc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EED 10716 bytes
font_02_sfnt_off000153bd.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153BD 16092 bytes

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