Malicious PDF — malware analysis report

Static analysis result for SHA-256 5523ffc9d66b87f8…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 20:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48679fe1c04fe4fc19a84037362219c0 SHA-1: 1e8909da5842d663a7e2e4d8aa259b93261ee493 SHA-256: 5523ffc9d66b87f89c0360fd83960358a7b7e580995a5de48fba372470a01d47
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the string 'https://ttraff.com/pify?keyword=golden+cydia+apk', which is also flagged as a malicious redirector. The presence of numerous links suggests a link farm or phishing attempt designed to lead users to malicious sites.

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=golden+cydia+apk In PDF document text
    • http://sadubo.johnmindeman.com/uploads/1/3/1/4/131482952/e0ed99951.pdfIn PDF document text
    • http://files.healingwithhorsesranch.org/uploads/1/3/1/4/131437669/kivumebofarilax-safawe-fiteva.pdfIn PDF document text
    • http://loxabaku.kmoranart.com/uploads/1/3/0/7/130775883/pezesevu.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/1/0437/0805/5720/files/5609707566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/4334/0697/files/82907587530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/epidemiologia_clinica_fletcher_5ta_edicion_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/lapakasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8507/8423/files/sirodamofepuzovize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/xagekimurodurubuxuruwegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/39272159094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/vodasomibesedotiwap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/gutima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/87604233389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/phytoremediation_technology_for_wastewater_treatment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1612/4576/files/vejodusimirejugi.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 4

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_off000061d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D4 4988 bytes
SHA-256: c420fafe15c3494d814cc806558315c0b5acca0ec0caffe3204dcc2bcc4db61f
font_01_sfnt_off000072f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 10012 bytes
SHA-256: 9f9ff608247a810d0c8ce8f591b8eb4a594c9c9719a22f500cb5a85c497a8714

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