Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f52bb0e658e3e7…

MALICIOUS

PDF

53.1 KB Created: 2020-08-15 16:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa178a26c745b2f6d0920e11d90ee2c1 SHA-1: bff0e1c1bc34e84bb3d50834cccdad73fa2c9838 SHA-256: 84f52bb0e658e3e7fbd1a235c3ba123e35d02d306a61f281c1a5207f4a5cb326
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wb?keyword=trigonometry%20project%20for%20class%2010%20pdf'. This suggests the document is part of a link farm designed to drive traffic to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=trigonometry%20project%20for%20class%2010%20pdf
    • http://files.dorzasdrivingschool.com/uploads/1/3/1/8/131871535/vupivuwofosogu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/loxudenulividasunegik.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/86131492121.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/44604037927.pdf
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/tejesatosil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/xolapesipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/17980919647.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/fosofekadoxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8744/files/7607947038.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/zejebukeja.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/69498386145.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/south_american_countries_capital_and_currency.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_off00007168.bin
2a5838e483d0213d480747f009ad07357737c00e6fd291847abed1a2c621efef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7168 5796 bytes
font_01_sfnt_off00008516.bin
7f1597c68d728fcfeb359fe9d2c9441bb5b11169c8bb029e7d1ce95a1ab01796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8516 14088 bytes
font_02_sfnt_off0000b202.bin
76542275dcc2ea9b21c54e2d6f64ffe9718c1bd1faeb33aa5a2590209ad74f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB202 16236 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.