Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d645c468a21b25…

MALICIOUS

PDF

44.4 KB Created: 2020-08-20 21:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07664dd76a666a3fd8d50388b265f2b3 SHA-1: 8a65575da4b57a7207eb56ad0685f44355bcc9fa SHA-256: 91d645c468a21b2527b73f24e10ebfd62b5178b3b73fc1139cdd7dc0320820f5
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as educational content. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm pointing to various PDF files, many of which are hosted on potentially malicious domains. The primary malicious URL is https://ttraff.cc/pify?keyword=free+fact+and+opinion+worksheets+3rd+grade, which likely leads to further malicious content.

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.cc/pify?keyword=free+fact+and+opinion+worksheets+3rd+grade In PDF document text
    • http://pibeve.weldnbraze.com/uploads/1/3/1/4/131438366/letinesun.pdfIn PDF document text
    • http://pupibam.johnbeswickfurniture.net/uploads/1/3/0/7/130775455/2605111.pdfIn PDF document text
    • http://files.derekpublishing.co/uploads/1/3/1/4/131437670/wevit.pdfIn PDF document text
    • http://files.tomballmemorialcheer.com/uploads/1/3/0/8/130813146/6846a2e3a.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/1/0428/9763/7535/files/dorinunaredobitepebobiwop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/caste_list_in_tamilnadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/exercicios_de_ingles_imperative_form_6_ano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7780/3931/files/60647981756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5398/1589/files/4907274743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/18717700329.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7112/7206/files/vefukesam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3482/9222/files/periodic_table_of_elements_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/abbyy_to_word_converter_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/butuxavibuxarazisub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/assertiveness_books.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 2

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_off00006daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 5660 bytes
SHA-256: e67fcb1b595e9afdb8e1b9a94c0cf62908a33477b102b4354aae37871c05eb9a
font_01_sfnt_off000080fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80FD 10456 bytes
SHA-256: 6cf1d15517c9dbf2c36d70bf0ad9ee233f00b835a259c6d3f4a7fc3365b853b8

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