Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a59a5864190274a…

MALICIOUS

PDF

39.2 KB Created: 2020-08-26 10:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75813ba8e2d5a884359cc0ab5e02796d SHA-1: 987ac58e4bc02269e02b864c5a90c03db3cc5725 SHA-256: 3a59a5864190274a9d0ff1f944e6890b5ffe7d5cda1d954e3ad20e3f7f1edd3c
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure related to software installation guides, specifically mentioning 'Microstrategy 10.10 gu ada de instalac'. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL.

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.me/pify?keyword=microstrategy+10.10+gu%25C3%25ADa+de+instalac In PDF document text
    • http://files.ancientpocket.com/uploads/1/3/0/8/130814226/voteg-vunef.pdfIn PDF document text
    • http://files.librariansguildla.org/uploads/1/3/1/4/131454420/gorifibuge.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/1/0432/1338/9992/files/complete_guitar_chords_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5037/7120/files/74100914644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2317/2503/files/75351536291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/literatura_inca_jorge_basadre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/99216039433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/guided_trekking_tours_scotland.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6994/5509/files/baxomuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/bluestone_alley_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/8606604749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/75164181616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7014/4155/files/briefing_note_template_government_of_alberta.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 2

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_off0000567e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567E 5496 bytes
SHA-256: 62b3c7bfa07e0a4c86241733fb417507a3f960b592f4ca1b278582a4709b431d
font_01_sfnt_off00006952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6952 11196 bytes
SHA-256: 1823748003862c603f8b3280c60159188aee396a4a8246c359ba2c85aaf96a9b

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