Malicious PDF — malware analysis report

Static analysis result for SHA-256 6477bb51e6bfd182…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 20:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18f24d8b684e96fd14f5fcf58b777d7f SHA-1: 3fe45c3c7794ca86d3bf3abe2b20fbb70019f2cf SHA-256: 6477bb51e6bfd182e1b0a8d221682e22d08a0eb882a54d07995ce81ed8540eb1
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The document body and heuristics indicate a lure for academic papers, likely to trick users into downloading malware. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest 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.cc/pify?keyword=afternotes+on+numerical+analysis+pdf In PDF document text
    • http://files.gaythessaloniki.com/uploads/1/3/0/7/130776589/jaxizoketeru.pdfIn PDF document text
    • http://files.stagecouprecords.com/uploads/1/3/2/8/132814972/soxevopuworisosipofi.pdfIn PDF document text
    • http://tefokejer.permitsfl.com/uploads/1/3/1/4/131438641/6423695.pdfIn PDF document text
    • http://files.upinsmokepottery.com/uploads/1/3/0/7/130775025/400f729d.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/1/0433/0687/7080/files/29025511016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2250/8447/files/66239999725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/polomozexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/76562705505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6225/5013/files/19751822860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/kisuselif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6576/9110/files/vorekozuwirujiwaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/86676216202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/33271040254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/pojuropanebapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4041/4615/files/najusejibidovirebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3138/6529/files/anna_karenina_novel_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 3

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_off000062a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A0 5392 bytes
SHA-256: fa71b02f14f8cc59c33a299cee5318691ade84c273b89f8541b09d5bda6d8231
font_01_sfnt_off000074ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74ED 10316 bytes
SHA-256: 8521fe09cf1d15bda06e6d57c0096e388c40038ed5f0c17d5cbcc291050947a2

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