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) First seen: 2026-05-09
MD5: aa178a26c745b2f6d0920e11d90ee2c1 SHA-1: bff0e1c1bc34e84bb3d50834cccdad73fa2c9838 SHA-256: 84f52bb0e658e3e7fbd1a235c3ba123e35d02d306a61f281c1a5207f4a5cb326
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to a malicious URL, disguised as a trigonometry project. The ML classifier strongly indicates maliciousness. The embedded URL, https://ttraff.ru/wb?keyword=trigonometry%20project%20for%20class%2010%20pdf, is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 In PDF document text
    • http://files.dorzasdrivingschool.com/uploads/1/3/1/8/131871535/vupivuwofosogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/loxudenulividasunegik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/86131492121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/44604037927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/tejesatosil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/xolapesipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/17980919647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/fosofekadoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0183/8744/files/7607947038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/zejebukeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8511/0171/files/69498386145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/south_american_countries_capital_and_currency.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7168 5796 bytes
SHA-256: 2a5838e483d0213d480747f009ad07357737c00e6fd291847abed1a2c621efef
font_01_sfnt_off00008516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8516 14088 bytes
SHA-256: 7f1597c68d728fcfeb359fe9d2c9441bb5b11169c8bb029e7d1ce95a1ab01796
font_02_sfnt_off0000b202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB202 16236 bytes
SHA-256: 76542275dcc2ea9b21c54e2d6f64ffe9718c1bd1faeb33aa5a2590209ad74f52

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