Malicious PDF — malware analysis report

Static analysis result for SHA-256 def921ad53d18a32…

MALICIOUS

PDF

48.8 KB Created: 2020-08-17 00:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 45b1c13a0e71c076a8e3724847392359 SHA-1: d829b3bb94b2a75956ad1d940038b95028078525 SHA-256: def921ad53d18a3253070a2dab74246bb6f3650558462e19eefdf5cf75991c3e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=modern+calligraphy+tutorial+pdf'. This URL is presented within the document body, disguised as a calligraphy tutorial. The PDF also contains a link farm heuristic, with multiple links hosted on Shopify, suggesting an attempt to distribute malicious content broadly. The primary malicious IOC is the ttraff.ru redirector.

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=modern+calligraphy+tutorial+pdf In PDF document text
    • http://files.aurorahealthservices.com/uploads/1/3/2/6/132682106/a3ef653.pdfIn PDF document text
    • http://fufimala.ceramicsmaui.com/uploads/1/3/0/7/130739591/6135623.pdfIn PDF document text
    • http://tejiveba.praisenyc.com/uploads/1/3/0/7/130776827/bizirijabojivudojis.pdfIn PDF document text
    • http://files.hartmanholistic.com/uploads/1/3/0/7/130776676/xoxew-rafadugi-miroxeg-teviguxogat.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/1/0428/9835/8432/files/tovaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/16390701164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/4487746459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/website_design_process_steps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/microsoft_document_imagining.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/4766051859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/hansae_co_ltd_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/zutotajisulukegut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/54620720960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/15369528579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/apartheid_foreign_policy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1290/7427/files/xosazotuzedepidoterol.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 5

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_off00008184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8184 5348 bytes
SHA-256: feb7411e35e6742a18b5092781074cf422889ec8d11573941c3a060e3b277851
font_01_sfnt_off000093b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B7 10032 bytes
SHA-256: b6092cb4b1028e8717843bb0e944867b63e60670621710679368a24621beb8a0

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