Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca43d72d6d463dc0…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 03:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: deab20db50e1b1256cd02ffe84973773 SHA-1: a6ce6c9c9db9b3d2facdf614853da528f95770a3 SHA-256: ca43d72d6d463dc006e47221c6c4eb54a079ed6e7094c168308686d974ef60b2
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially garbled, contains text related to 'Ibps clerk mock test papers pdf' and a URL that points to a redirector. This suggests a phishing or scam attempt where users are enticed to click links that lead to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=ibps+clerk+mock+test+papers+pdf In PDF document text
    • http://files.daunward.com/uploads/1/3/1/4/131409442/d7b4e1.pdfIn PDF document text
    • http://files.mermaidinforeignwaters.com/uploads/1/3/1/1/131164122/vuvojurigoz_kaneva.pdfIn PDF document text
    • http://files.averagemanoncampus.com/uploads/1/3/1/1/131163833/3743098.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/1/0447/8612/2901/files/estrus_synchronization_protocols_in_dairy_cattle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/genadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/63647758859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/medical_abbreviations_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9993/1295/files/rufowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/norobegilunavutugaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/biblia_catolica_jerusalen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/bopapanugosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4437/0594/files/byomkesh_bakshi_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/67714984992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5903401900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/janulidatamosixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/malisafajavovoj.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 6

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_off00006c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C11 5440 bytes
SHA-256: c2b3576152ae9ec25405ed7a9f2898cada4d25ca83f4f1131c7b2560f9a70676
font_01_sfnt_off00007e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6A 10064 bytes
SHA-256: 18dfee24f4729e00c21ab7f393e1e68dba78f5d5f714410634aa02c29185d81c

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