Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c45bf34f32c9674…

MALICIOUS

PDF

33.6 KB Created: 2020-08-03 10:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0e32f422ddb7996c466a152f503a4207 SHA-1: c4e645fb8e0282c762916b86e4a492cfdbcf9b5d SHA-256: 4c45bf34f32c9674a4281045102a41c4e9c11df7384e3b9689d0b0103b7bc27e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting an SEO manipulation or phishing attempt. The primary malicious URL identified is https://ttraff.ru/pify?keyword=saxon+algebra+2. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=saxon+algebra+2 In PDF document text
    • http://files.princetonacrugby.com/uploads/1/3/2/7/132740870/mikefawonanetuvobire.pdfIn PDF document text
    • http://files.readwalkpaint.com/uploads/1/3/0/8/130815095/fapiwedevojen.pdfIn PDF document text
    • http://files.tsabs.bg/uploads/1/3/0/8/130874458/df4513d5.pdfIn PDF document text
    • http://files.lowcountryliberals.com/uploads/1/3/1/4/131483009/rubinumu.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/1/0433/5727/4270/files/60045558197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/mirafesuvibufejolux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/47554539811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8888/7460/files/96657770921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8076/files/24054183609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5920/8604/files/30781107653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/55370483039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7895/9775/files/dark_jedi_brotherhood.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4418/3974/files/83539879255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/36543570336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/nenezuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xibazukikamemawamiwemin.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 6

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_off00004862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4862 5116 bytes
SHA-256: 6f46308e88a08790d272c96902198144275700667003bce4f67a28442de93c62
font_01_sfnt_off000059dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59DC 9384 bytes
SHA-256: 12d52109931049dad2dc1663638e70b6d93ce7faaec970528cdc0924ad806213

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