Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0f5c7804098487…

MALICIOUS

PDF

36.5 KB Created: 2020-08-02 05:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d1194c643c82df97c825243ecb8bd39f SHA-1: 7f62636148fdcd6224425404550d11f3e8331228 SHA-256: ca0f5c78040984877ece40c0a6d470e8e8038723d7eb937ce621a1cd3e7611f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body and embedded links suggest a lure related to 'Skyblock server pe', likely a phishing or scam attempt. The ML classifier strongly supports the malicious verdict.

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=skyblock+server+pe In PDF document text
    • http://files.pinnaclechartermusic.com/uploads/1/3/1/6/131606745/toxero.pdfIn PDF document text
    • http://files.michaelcmarshall.com/uploads/1/3/0/7/130776828/16ff3fe8c.pdfIn PDF document text
    • http://files.beenwheredonethat.com/uploads/1/3/1/4/131437508/xazolakelenedo_jamajatixugasa_xitakirapi_nipuvatubapibi.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/1/0428/7689/5398/files/gpa_calculator_uky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1197/3025/files/votujikesefuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taniseraguvifololesugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/44379257436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/66116213460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/15175604691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/67434578650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/71985218297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/86185669101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/xizazaruzeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3142/0314/files/zulivemigebekenabon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/38695067688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6395/7918/files/xarulitowomibakedox.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_off000050c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C5 5184 bytes
SHA-256: e0ed056ab6c02300cefeb3f74b3e9b4fc538f6e3153f46cb20632d3cb1d66640
font_01_sfnt_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 10156 bytes
SHA-256: a8d265b273c9aea77e9c2066e4109d2509ede8b76d2cacaa8edfe409a30cabef

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