Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6533d5afacf7ca…

MALICIOUS

PDF

47.8 KB Created: 2020-08-19 00:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fcdc66c6cfb564e1de7b29fe0bb01153 SHA-1: e0ff182031371cbae2c199213bfbae947b9861e9 SHA-256: 4c6533d5afacf7cab853cd7042ca8b65b1c1155dad9ab84c7e57aa5ccf814cf0
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 indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'Waec examiners report 2018'. The presence of a link farm and a redirector URL strongly suggests an attempt to lead the user to malicious content or a phishing site.

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=waec+examiners+report+2018 In PDF document text
    • http://xekope.critgeoed.com/uploads/1/3/0/8/130813420/senefuxadora.pdfIn PDF document text
    • http://files.victoriouslivingbiblestudy.com/uploads/1/3/1/4/131438274/3d06473430a8.pdfIn PDF document text
    • http://wepex.metalmermaid.com/uploads/1/3/0/8/130874284/goguzag.pdfIn PDF document text
    • http://files.ericheerspinkceramics.com/uploads/1/3/0/8/130873822/5cd3b0c.pdfIn PDF document text
    • http://files.mrsgeorgiainternational2016.com/uploads/1/3/0/8/130874369/120a3.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/1/0428/8921/6163/files/30894759530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/76035504399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/talutekokefedabemubuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4008/6933/files/72247384654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/99282861212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/most_common_user_agent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/88981994268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/nenaguxusujuxosakenunapig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/caprice_24.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_off00007c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C4C 5648 bytes
SHA-256: 6b00ac33cf5822d932895c3f3de9439d40f9510f8037f992de415835913ff3e0
font_01_sfnt_off00008f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F7A 10160 bytes
SHA-256: 2b2a9c5920fcbb014dfb7ae6e16f0e88714614f78489215a1972d3193cfeb0b9

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