Malicious PDF — malware analysis report

Static analysis result for SHA-256 75eb3687f731711a…

MALICIOUS

PDF

45.1 KB Created: 2020-08-22 21:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41bfc0bbbd0bcc48c9dea741f91a7918 SHA-1: a003fa78c36546e15e2104898d3224d740161ba1 SHA-256: 75eb3687f731711ae60a96f8ce07ba4fbd11277d483278ace3c0c5b86e6de683
194 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though partially corrupted, includes the same malicious URL and benign-looking PDF links, suggesting a link farm or SEO poisoning tactic to lure victims. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=great+fugue+in+g+minor+sheet+music In PDF document text
    • http://files.diannebersea.com/uploads/1/3/2/8/132815791/fead9157f58c31e.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/1/0431/6856/3355/files/84125889523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/50194365383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6107/4333/files/mastoiditis_cronica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/android_avd_manager.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/8067827318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/nokumunesilopafiloxula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/pobezekirupijotit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/23727893687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6763/7922/files/calculus_7e_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/20549718979.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/97571182377.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 8

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_off00004f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F60 5296 bytes
SHA-256: 9dfea55b3144f7bfb52a5b0f8dbe1f7b07ea70cdf6343672f6b2d568fb5ff26d
font_01_sfnt_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 15016 bytes
SHA-256: 1650e2e68a4f5b723fdc658b73340c15ae6bf10d70885c3a4c7e4a479c5a6b7e
font_02_sfnt_off00009065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 16120 bytes
SHA-256: 184efd0e138a9418359f6897f9ac56b5cd93cafbd57abf30711ac2aee7e18832

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