Malicious PDF — malware analysis report

Static analysis result for SHA-256 062ffeae49a0c68c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-12 22:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bffe2604c7c52f77643927eaddf98327 SHA-1: de85f6d739bdb811301f8464319defc2228e3768 SHA-256: 062ffeae49a0c68cf7cd8c2f4009eec5f82d01e9aac56b1e60683969526497d7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that likely leads to this redirector. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or a method to disguise malicious links among benign ones. The ML classifier also strongly flagged this PDF as malicious.

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=emerald%20city%20of%20oz%20pdf
    • http://files.lisaguice.net/uploads/1/3/1/3/131379085/09c663a493dcaa3.pdf
    • http://files.droolwool.com/uploads/1/3/1/4/131437725/8566107.pdf
    • http://files.123playandlearn.com/uploads/1/3/2/6/132683259/jipazobuzazo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/93392436081.pdf
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/24448010046.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/93023985458.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/39471483437.pdf
    • https://cdn.shopify.com/s/files/1/0432/1420/9186/files/potifuferokonedudir.pdf
    • https://cdn.shopify.com/s/files/1/0433/5111/3887/files/gitumikogopab.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/dunupu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2718/4281/files/africa_cup_of_nations_2020_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/61652884225.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/very_simple_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/laxejejudaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/gce_a_level_biology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6070/files/8635100495.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/88328918335.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_off00005ecb.bin
326f36c94d6f213f16f0d93cdf63fa4ca8469a2ad83c2fc025da1920974118d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECB 5232 bytes
font_01_sfnt_off0000708b.bin
e797cd6ea2ce3060cbd052480acb4937b8bc53bbf23a2b13e4ccccf1ad3ac64c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708B 9764 bytes

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