Malicious PDF — malware analysis report

Static analysis result for SHA-256 539a543e9f5e0e23…

MALICIOUS

PDF

43.2 KB Created: 2020-08-07 23:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a32d139d354d4065b486fc9cecd4bb5a SHA-1: b002f707c03e4ced1c1fc271a24c81d2fdd8ef88 SHA-256: 539a543e9f5e0e2338959487044e292de4195951029c644cae250f2b97ca7178
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic. The primary attack pattern involves luring users to malicious infrastructure via these links, likely for further exploitation or credential harvesting.

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=cartilha+agricultura+biodinamica+pdf In PDF document text
    • http://nabeluget.northhadleysugarshack.com/uploads/1/3/0/7/130739678/jovosivijunorifaz.pdfIn PDF document text
    • http://files.9thmediumregimentra.com/uploads/1/3/0/7/130738943/sufiritalibe.pdfIn PDF document text
    • http://files.artbymkd.com/uploads/1/3/0/8/130873979/6244392.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/possessive_pronouns_vs_adjectives_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/wenesibelugomin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/foxukexow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/mojawofegirudokeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0015/1707/files/ttd_telugu_calendar_2020_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/jivapomepuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/9518080242.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3B 5316 bytes
SHA-256: 34473c8ead58ab0ee60d7a9c7cc4d6e606143adf372b720fce75e2eb67741eda
font_01_sfnt_off00006d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D14 11200 bytes
SHA-256: e858f7c767dcaf40d2ff482df5d0b5fd632c4b6c6f5fbe2ef19877f9539e0e61
font_02_sfnt_off000091d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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