Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe19736ee267540…

MALICIOUS

PDF

38.4 KB Created: 2020-08-21 04:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbacc5db235ed3e7490d54484ad3df93 SHA-1: 2a24c2d23eac78948705145ae562ac18c51b15d2 SHA-256: 5fe19736ee26754009e51c761bdd71f5bf16ececf1a6bd699f8b12a39b600e1e
194 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with a primary link redirecting to known malicious infrastructure. The document body and heuristics indicate a lure for postgraduate application forms, likely a phishing or scam attempt. The ML classifier strongly flags this PDF as malicious, and the presence of numerous links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=bond+university+international+postgraduate+application+form In PDF document text
    • http://files.watips.net/uploads/1/3/0/9/130969085/tefiwibajizu-pokotuvotaxomi-tikeg.pdfIn PDF document text
    • http://didug.wilderblubordercollies.com/uploads/1/3/2/8/132814930/korazevazukubu.pdfIn PDF document text
    • http://files.mrusselldesign.com/uploads/1/3/1/4/131407705/048fbef28c7825.pdfIn PDF document text
    • http://dogosise.twinlakeswaterskiclub.com/uploads/1/3/1/4/131437601/655d37573ce077.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/1/0436/9874/9608/files/cat_on_a_hot_tin_roof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/67377236047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2931/files/44266400927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/alcoholismo_causas_y_consecuencias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7086/4025/files/witakuziwujix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/34105887404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6925/1487/files/mdu_b._ed_form_2018_last_date.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2916/2152/files/asthma_diagnosis_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/paradise_lost_book_1_download.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 7

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_off00005365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5365 5688 bytes
SHA-256: a778729557f7506a1f63f8a107f6406d4032527e05954a6b13db3aa57d698bcd
font_01_sfnt_off000066b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B7 11088 bytes
SHA-256: 7bd749623a2d3b2a858094842ba330437cf16eb077459467f13ee38e01b15c1e

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