Malicious PDF — malware analysis report

Static analysis result for SHA-256 4666893dbddd5071…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 20:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6ba2712571042e3545b976267b75ec8 SHA-1: 950622378bc8ef0aedb230245bc634382bb21e61 SHA-256: 4666893dbddd5071b9003fa4e96c7e60f9219c842d6e919a995650ab24b64730
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as 'introduction to anatomy and physiology test answers'. This link, 'https://ttraff.cc/pify?keyword=introduction+to+anatomy+and+physiology+test+answers', leads to known malicious infrastructure. The PDF also hosts a large number of external links, many of which point to potentially malicious content, suggesting a link farm or distribution mechanism for further payloads.

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=introduction+to+anatomy+and+physiology+test+answers In PDF document text
    • http://files.mellamarministries.com/uploads/1/3/1/4/131406663/gibeje-gapokumufusog-nopotudesevofeg.pdfIn PDF document text
    • http://files.serenarilab.com/uploads/1/3/1/1/131163737/8263448.pdfIn PDF document text
    • http://zuzekoji.unicuswatersolutions.com/uploads/1/3/0/8/130814328/68b319d6ed865e.pdfIn PDF document text
    • http://files.creativationevents.com/uploads/1/3/1/3/131380493/6612511.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/1/0436/2679/1075/files/57063712425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/duvonupolaludar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/pilatugogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/dobosejegixodoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/baixar_weeny_free_extractor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/fululuxoxufagi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/xfinity_stream_app_roku_won_t.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/purebdcraft_texture_pack.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 8

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_off00006d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 5620 bytes
SHA-256: 2615763461d7186e1071a17e312ac76bf6eba27526923654554696a525fc74a2
font_01_sfnt_off00008081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 10560 bytes
SHA-256: 5ee85db0666e377e32fce03936bf869a4aa7fd116e80231d1b97362d3979c548

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