Malicious PDF — malware analysis report

Static analysis result for SHA-256 4728ed0215d21e4d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-25 06:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee1997b44e9f28553c4cd754d38bcf93 SHA-1: c102b4adfc215e8d37a06ecd84413aa569023ee3 SHA-256: 4728ed0215d21e4df6c3abbd349cafb989b4610e4de4881c51a06371b7d9fe26
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, disguised as a 'tnpsc departmental exam answer key'. The document body also contains numerous links to external PDFs, many hosted on Shopify, which is characteristic of SEO link farm abuse. The primary malicious URL is https://ttraff.cc/pify?keyword=tnpsc+departmental+exam+answer+key+dec+2018, which is a 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.cc/pify?keyword=tnpsc+departmental+exam+answer+key+dec+2018 In PDF document text
    • http://vegulusix.ameliasherry.com/uploads/1/3/1/3/131379730/kejelebizogela.pdfIn PDF document text
    • http://files.shorklabradors.com/uploads/1/3/0/8/130814043/dokeja.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/1/0428/3308/4575/files/8596016055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2955/3575/files/97181812222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/bootstrap_download_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9423/7593/files/7191345017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zututekafufefosapebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/2003_honda_element_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/manonukobipuwujerulirus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/narazavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/lubiwipabogawukajalulafuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/wibimunelutuwajutobado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4630/4933/files/97599226173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8729/8714/files/58247613095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/compendium_of_emerald_tablets.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_off00006584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 6016 bytes
SHA-256: 8a06364ba62f363c71b29a6975f6c56447491ea6c2717df3ee4aa7ba6d703d40
font_01_sfnt_off00007a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A01 15224 bytes
SHA-256: fcc3210061c6c2fe9248b12767cfebe717d3742e2d90ef948f2f57331961ac86

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