Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fcf366f27cec6e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 01:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d04cffe1c98052187533df1fa9ea241e SHA-1: 3fecd57cd8b9e7897b9fe74af611a78e91036cd3 SHA-256: 21fcf366f27cec6eb1ab29290bf75c77f06b6b074104c09f04b57abde11f7184
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, suggesting it is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure. No scripts were extracted, but the presence of multiple links to external PDFs and a malicious redirector indicates a phishing or malware distribution 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.ru/pify?keyword=babul+ki+dua+video+song In PDF document text
    • http://lukuri.jimpendergrass.com/uploads/1/3/0/7/130775062/sapubofatibo.pdfIn PDF document text
    • http://nobosub.smalltimerock.com/uploads/1/3/0/9/130969042/kafovegilurezaxaledi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/nonuwaromavurun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9341/6349/files/brochure_design_software_free_full_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1482/4607/files/bloatware_removal_tool_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/92003909152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/21252199168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/beauty_salon_logo_templates_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/zopugimoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/free_basic_english_lessons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/learn_kathak_dance_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/valujonopediwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0409/8722/files/20730397599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3702/4679/files/venoxowebibodipis.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 1

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_off00005564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5564 5212 bytes
SHA-256: d61466f61461b08f3b68db2005ebd57f890dfd63a92d91d8cf03bd84ca209f18
font_01_sfnt_off0000672f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 13792 bytes
SHA-256: 55206a980daa68e9049f923845db4c0e4c62cd1c60e9d75e1f8d18474836a410
font_02_sfnt_off00009325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9325 4388 bytes
SHA-256: 79757ae837fa224e4673cbf54fcce3de8ba2986640d69969113f35aa94b668b8

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