Malicious PDF — malware analysis report

Static analysis result for SHA-256 585a82f72eaa51a0…

MALICIOUS

PDF

47.2 KB Created: 2020-08-12 18:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0d58ecced1dc9f979bbe710e9a54bdd SHA-1: b5eade1a9b0c2de89e2b4f99997ff8283ffaa1e7 SHA-256: 585a82f72eaa51a05e2a68906b3e455e6c04fc7dc05293eed19673a2ada4e90f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Also sprach Zarathustra' and financial mathematics, likely serving as a lure to encourage users to click the malicious links. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly indicates a phishing or redirection attempt.

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/pify?keyword=also+sprach+zarathustra+trumpet+pdf In PDF document text
    • http://files.restoreptllc.com/uploads/1/3/0/9/130969573/pujabijesawegerosi.pdfIn PDF document text
    • http://files.holytrinitylutheranchurch.org/uploads/1/3/1/6/131606396/79fd1625b2d1.pdfIn PDF document text
    • http://rumimalo.gnosisadelaide.com/uploads/1/3/1/4/131437423/6236099.pdfIn PDF document text
    • http://files.praktische-philosophie.org/uploads/1/3/1/3/131380345/1497040.pdfIn PDF document text
    • http://files.drake-oakbrook.com/uploads/1/3/2/6/132683292/3409323e.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/1/0428/6673/7311/files/39933692386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/introduction_to_financial_mathematics_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/99190789074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/93603618809.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2489/8453/files/fatenesabobage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8089/9989/files/jajok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0877/7637/files/tafap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/levantamento_planialtimetrico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/95961815554.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 5432 bytes
SHA-256: 5d0d17c47f2260413c1ae23bc7b237d7c17e3a41e60a4530d2b86e36ffb61d57
font_01_sfnt_off000075dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 10692 bytes
SHA-256: 499d20757a51e369e7bb9e408791b2c20107d1742e8c414678d95f737ba5fe8d
font_02_sfnt_off00009ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACE 16120 bytes
SHA-256: 73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75

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