Malicious PDF — malware analysis report

Static analysis result for SHA-256 f483b86aeb920a56…

MALICIOUS

PDF

38.7 KB Created: 2020-08-19 05:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb39044c11b65a679004d044c39ff550 SHA-1: 23cc1218ed56135240999aaf968aca095eaaf9da SHA-256: f483b86aeb920a56148d53337990a57d359eac2c7120d2e698858c1d1766f2d4
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely serves as an initial entry point for further malicious activity.

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=arya+mbbs+songs++masstamilan In PDF document text
    • http://files.ninjagoats.org/uploads/1/3/1/3/131398428/negiku-muzosufifono-vejalaxo.pdfIn PDF document text
    • http://fudesi.spitzpsych.com/uploads/1/3/1/1/131164239/1c50171ac64f4.pdfIn PDF document text
    • http://zineta.gem-uk-properties.com/uploads/1/3/1/3/131398020/3efc04d5389.pdfIn PDF document text
    • http://files.egelstonmaynard.com/uploads/1/3/1/0/131070173/0dab1b.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/1/0439/1596/8667/files/21459064504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/the_challenger_foraminifera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/70624563262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5122/9089/files/64229464363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/61307299515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/circuit_switching_and_packet_switching_and_message_switching.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/angka_1_sampai_100_dalam_bahasa_arab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/55026463482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/jabedenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/gikubezotowefizewuperax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/aufklrung_impfung.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_off00005148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5148 5236 bytes
SHA-256: 6a2600d44d2f28ecd44073d3850da49c437697ee22175025c3a4136e2ab63d88
font_01_sfnt_off00006308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6308 13592 bytes
SHA-256: 99213f93d3d6ccad0aabf2b282332cdbc042a9c96339bc011361286064ad38c2

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