Malicious PDF — malware analysis report

Static analysis result for SHA-256 da310dca84d6485c…

MALICIOUS

PDF

74.0 KB Created: 2020-07-27 13:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c2d51dda5dc627d3e03e039ebcb4523e SHA-1: eb935153e9a863d71b1c4533a9e9375f0b26837e SHA-256: da310dca84d6485cf3fb3386c8a220941824efc597729377dfd1a3582245eb4e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains keywords related to professional development, suggesting a lure. The presence of a link farm indicates an attempt to manipulate search engine results or distribute malicious content broadly. 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=formative+assessment+professional+development+ppt In PDF document text
    • http://files.parishardaghmoydow.com/uploads/1/3/1/1/131163846/6792106.pdfIn PDF document text
    • http://files.legacystylingsalon.com/uploads/1/3/2/6/132681660/6965620.pdfIn PDF document text
    • http://files.ainokonkka.com/uploads/1/3/0/9/130969960/fe0d8bf6ad0d6.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/1/0427/6974/4028/files/juzetunegixulebijugajope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4337/files/29720191852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/6213868402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/lurakaximidozekifav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/84772673661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0137/9996/files/97717150885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1281/files/72119996889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/degitarakeketi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/kewejelugesesapoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/gexubujop.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 3

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_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 4988 bytes
SHA-256: 990805a680b204b18476b4cd8e72061330b282958e6b3a8c0bad2dbc39548f8e
font_01_sfnt_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 11264 bytes
SHA-256: 02006a7a8cc2994ce8e61efeaa9419dc1ff1d7b1b0d372ba61ff2bedc8d2c7f3

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