Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f002819f75ba0c6…

MALICIOUS

PDF

50.3 KB Created: 2020-08-28 17:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0303755124e7dca6ed80ac5e59548a5 SHA-1: f970e6487ee808d22aa0f0c985a3da591ab3c2f6 SHA-256: 6f002819f75ba0c617f50acaf5f077ed7566ad8dac60f8f338799f475f0f1d8e
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external PDF links, many of which point to potentially malicious redirectors. The primary malicious URL identified is `https://ttraff.ru/pify?keyword=gilmore+girls+coloring+pages`, which is flagged as a known malicious redirector. The document body also contains this URL, suggesting an attempt to disguise malicious content as coloring pages.

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.ru/pify?keyword=gilmore+girls+coloring+pages
    • http://files.nakukuinetlinks.com/uploads/1/3/2/7/132741433/7ca61e.pdf
    • http://toketamu.maryjzach.com/uploads/1/3/2/6/132680874/079d739c5.pdf
    • http://files.bostontibet.org/uploads/1/3/0/7/130738681/kalafidalu.pdf
    • http://files.fresnonutritionsolutions.com/uploads/1/3/2/6/132683111/9806049.pdf
    • http://miwebaf.diamondkstables.com/uploads/1/3/0/8/130873998/zemaxam_mifiri_tujaxewuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/bubotuvifiwexokofiva.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/sequoia_national_forest_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/kumug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/stock_market_basics_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/tufoluritidadagufeva.pdf
    • https://cdn.shopify.com/s/files/1/0459/7222/6215/files/45050798808.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/13559811092.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/paketurududurikunudisan.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/39438168924.pdf
    • https://cdn.shopify.com/s/files/1/0429/1382/4927/files/3858582798.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3478/files/ligavozafajibuwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8072/files/dowasutilawago.pdf
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/95373754686.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_off0000879b.bin
22510a0a844463b392efb8020d203a892fa6088f444444a9909b8ed832fa59d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 5284 bytes
font_01_sfnt_off0000997d.bin
32e4bd1aa99ef95f1cd8e0281694747ff00949834b49433a2567b13cddd179f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x997D 10120 bytes

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