Malicious PDF — malware analysis report

Static analysis result for SHA-256 af502894ba8dc02e…

MALICIOUS

PDF

39.5 KB Created: 2020-08-15 07:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 32e78099fc4ae6a11db7e56fb5f896c2 SHA-1: d1381ea6dd53e2e971cbb4f8640a53c1755c3f44 SHA-256: af502894ba8dc02eb286a0020622092d15106596d97517afc0e453a8413c9d1c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links to other PDF files, characteristic of a link farm. One of these links, 'https://ttraff.com/pify?keyword=bhoot+uncle+video', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector suggests an attempt to lure the user to a harmful site.

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.com/pify?keyword=bhoot+uncle+video In PDF document text
    • http://files.mckaychurchsupply.com/uploads/1/3/0/7/130776757/b55f9b.pdfIn PDF document text
    • http://gegirezuj.rangebourne-pets.co.uk/uploads/1/3/2/7/132740228/nizabelovefizejubura.pdfIn PDF document text
    • http://kitov.wigandcandle.com/uploads/1/3/2/7/132740405/6052902.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/1/0432/5244/9444/files/surah_yasin_rumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/688564200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/tizupezorobowerisojewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/kubopozoximanedol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/5178408835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/28895343490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/artificial_neural_network_seminar_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/mutirewokagut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/171680459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6332/7385/files/knee_rehab_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5989/4682/files/rogadolunosa.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 6

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_off00005ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE2 4652 bytes
SHA-256: 48aad16815a016ab7b1205f0cd8d46f1cdae6e7194b179088f3291bddc9533df
font_01_sfnt_off00006eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB8 10240 bytes
SHA-256: ea5e4cee3572c56f938ebec954b831196c944df6e387bb948b2df0d6ae0af854

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