Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b761e0b6c20ad4…

MALICIOUS

PDF

33.9 KB Created: 2020-08-20 22:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d8b37c59f76811e48b7da65762f25aae SHA-1: b7589b47d9b600b1eda364f66992b33c7e43c46e SHA-256: 22b761e0b6c20ad47cdbb253677e4991b11c17a07340babaf491846a8648c19a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=1st+grade+math+worksheets+counting+on, which is known to host malicious content. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly supports the malicious verdict.

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=1st+grade+math+worksheets+counting+on In PDF document text
    • http://files.diana-oasis.com/uploads/1/3/0/8/130813639/6408387.pdfIn PDF document text
    • http://dizorutu.swpay.uk/uploads/1/3/0/7/130775897/todalowelerame-fusidik-lijinanibib.pdfIn PDF document text
    • http://safutarol.callihanscache.org/uploads/1/3/0/8/130814328/900dd52.pdfIn PDF document text
    • http://files.heywoodracing.com/uploads/1/3/0/7/130775363/gakipazukaka_mesebepu_xiwapisisitug.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/1/0437/8735/4270/files/codex_basiliensis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1179/3315/files/4471240391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6304/1430/files/automatic_stirrup_bending_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2149/9548/files/botilesilixarulaniparawoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/bupeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/poxazisatojojow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1474/0375/files/windows_api_documentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/degogutobaxodojodezovu.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000478a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x478A 5436 bytes
SHA-256: 06fa2b2526fa5ecad8fd1baca12bc8313f2af137b36027af32e5f547057d11d4
font_01_sfnt_off000059f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F2 9676 bytes
SHA-256: 2597820d01dcfbcfe63d6fca49b17ce83795c5cf6f38b9350bb20a7dca8442d2

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