Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71eeb43f99330a5…

MALICIOUS

PDF

56.3 KB Created: 2020-07-30 17:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 586b11cbb569ad3ef7bb6d733cbfdeb3 SHA-1: 40f6634866d6b082452250630466b4590f6eaffb SHA-256: a71eeb43f99330a5fee2bae5da578acfbc61a4f493d9b09fbcec3e3c6f676645
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a significant number of embedded links, with the primary link directing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The document body, though heavily obfuscated, contains text related to 'Puntos de acupuntura para bajar de peso pdf', which is likely a lure.

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/wb?keyword=puntos%20de%20acupuntura%20para%20bajar%20de%20peso%20pdf In PDF document text
    • http://files.littleandjuniormissbutler.org/uploads/1/3/2/7/132740511/c8d55f.pdfIn PDF document text
    • http://files.outbackatpostoak.com/uploads/1/3/0/8/130874338/lafizevotup-sosepu-felajazufijijok.pdfIn PDF document text
    • http://files.edmparging.ca/uploads/1/3/1/4/131406827/3307736.pdfIn PDF document text
    • http://files.365downandout.com/uploads/1/3/0/9/130969710/rezegexavegepa-wufevelax.pdfIn PDF document text
    • http://files.thierryrmontoya.com/uploads/1/3/1/3/131380337/jejal.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/1/0434/8346/3832/files/56976857040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/xorasafinim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/rewelimiwuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3908/8022/files/98090582808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/mixinigozetirolajomino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/tadojasetil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/xewalijifudofimonale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/sojujojozafozezotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/kimugubobedukikawojamepe.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_off00009bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCD 5168 bytes
SHA-256: 993dc9ec50299b0adc77c48fb5fd1d93955f8a2ef6ad8d92fb7b42955d796f76
font_01_sfnt_off0000ad63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD63 11316 bytes
SHA-256: dab0624c62a12bc874e09163e816c105f42a93c15247bbd65f02dbdb4ce47a42

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