Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6722e4588e308d9…

MALICIOUS

PDF

42.6 KB Created: 2020-08-04 08:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e5e3c56cfb3db08230cc62af60434bd1 SHA-1: 28f6a03cdcba3f1c4a195b422c5b42c87073c19d SHA-256: d6722e4588e308d9fd9d39b40d2eb024bb21bdc36b00fb9d842a2eef0a173168
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with a primary link leading to a known malicious redirector. The document body and embedded links suggest a lure to download content, which is a common tactic for distributing malware or phishing. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector URL reinforces this assessment.

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.ru/pify?keyword=short+stories+for+reproduction+pdf In PDF document text
    • http://files.littlebrains.co.za/uploads/1/3/0/8/130873717/dikevofidunit.pdfIn PDF document text
    • http://files.arifails.com/uploads/1/3/1/0/131070861/673a29c85ce507.pdfIn PDF document text
    • http://files.cecilyscloset.org/uploads/1/3/1/3/131398323/wibekirekir.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/1/0444/0326/1606/files/basic_arabic_to_english_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/gefisapugologurudepozone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/tamil_bluray_movie_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/23690665178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4475/5866/files/sarobomejimobefasoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/fojijadoxoropin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1534/7103/files/77250364894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4415/0165/files/bioconstruo_bambu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/30189934129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/temoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/bitezasabefirelox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/vasalujadinegepij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0189/4296/files/41066141018.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_off00006793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 5104 bytes
SHA-256: 5f9867f6f039070731c83bb20512beec4bd3a3203fea8e0a97182dbabf8bf6c9
font_01_sfnt_off000078ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78EE 10812 bytes
SHA-256: cc640c861374376371afadf99ddc61be431083f8d7fd7c6c4039c725b8d7bd52

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