Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bb9fb3d81505d9b…

MALICIOUS

PDF

35.7 KB Created: 2020-08-23 08:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51991ba415638e344b255012373b45bc SHA-1: 447bcbff79d3bdac749b6c3e239f6f6d8592e7c6 SHA-256: 6bb9fb3d81505d9bfb85ee251d8925aa664b2a09266adc7fcf19dfba63b01769
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=tropical+background+free In PDF document text
    • http://gepuxu.globaleducationmove.com/uploads/1/3/1/4/131438500/dodopamusumawovu.pdfIn PDF document text
    • http://debiwulow.crjuices.com/uploads/1/3/0/7/130738909/rivomi.pdfIn PDF document text
    • http://files.practicalhomeplanning.com/uploads/1/3/1/4/131407423/fituvadopenux.pdfIn PDF document text
    • http://foriditek.alicenyquist.com/uploads/1/3/1/4/131406082/2f9d4dfee39426.pdfIn PDF document text
    • http://files.stonerstakeover.com/uploads/1/3/2/7/132712174/288f7b9c39bc.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/1/0429/6579/4969/files/77535772302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38684703775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/inspirational_quotes_poster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/wizipuwodivumabanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/6814428835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/guwatotebazarinarori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/923103327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/wuxixoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/xazemidijakefaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4007/1070/files/5266064958.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_off000050a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A6 5300 bytes
SHA-256: b786ee6f9c60fe85119103226c53c3c0e6449221bf55f2f428b7d7dc13a468d2
font_01_sfnt_off000062ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AD 9080 bytes
SHA-256: f6aeca6301d64e48fe3cc1f4ac947da3495551a77a4936a859ddf024cbb0e543

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