Malicious PDF — malware analysis report

Static analysis result for SHA-256 21707e77e043ffd5…

MALICIOUS

PDF

69.4 KB Created: 2020-08-26 08:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 724f28caf3abf6015a1cd9f4b74b8658 SHA-1: 5772d39b7eff138443308f2c30f98cdbd56fc0c3 SHA-256: 21707e77e043ffd55e9900eee06f4d9f5086597b33989ca68b9a5a5c781525b4
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ffxiv+the+obvious+solution'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The PDF also contains a large number of external links, characteristic of a link farm, further supporting the malicious intent.

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=ffxiv+the+obvious+solution In PDF document text
    • http://files.debeerphysiotherapy.co.za/uploads/1/3/1/0/131070402/6834348.pdfIn PDF document text
    • http://files.simplyyogacenter.org/uploads/1/3/1/4/131453718/140ae5.pdfIn PDF document text
    • http://files.millbrookrotarydirectory.com/uploads/1/3/0/7/130775846/d99ea.pdfIn PDF document text
    • http://wutoke.awpovrug.com/uploads/1/3/1/4/131483281/c47e79b43f8.pdfIn PDF document text
    • http://files.officesatlibertycenter.com/uploads/1/3/2/6/132682204/6335292.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/1/0433/6749/7880/files/liviferabuzujaremofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2021/2629/files/potunuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/fidiroteruxibubuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/service_manual_bobcat_583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/submit_form_to_web_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/palixekafotew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6646/6202/files/kebasuxara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2656/0677/files/botozex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/48480395438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/zetifixadanaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3389/2763/files/50183802773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0292/3939/files/19485344892.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_off0000d2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E8 4772 bytes
SHA-256: 18974cdc62e3062bdef9d9b50a6c57cc7dcbcf66e8d01dc3064f42ed24f0730d
font_01_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 11368 bytes
SHA-256: 2fe76a3062cc809c57ac3704b26079ef1f53d35ef7667d75d38cff0925f8037d

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