Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b31336a93fdd3c8…

MALICIOUS

PDF

47.2 KB Created: 2020-08-01 23:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37093a74513c1181afa4e911cc76ed53 SHA-1: f65fd98b1e1be6cc0e9883277e2e3dd414bac149 SHA-256: 4b31336a93fdd3c88351664583173761fe59e6543b12a2367b199162adb7adbe
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=wotlk+cooking+guide', suggesting a lure related to a 'wotlk cooking guide' which redirects to malicious infrastructure. The presence of numerous other PDF links indicates a link farm designed to distribute malicious content.

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=wotlk+cooking+guide In PDF document text
    • http://files.indestructiblekeychain.com/uploads/1/3/0/7/130738779/xulevomufigosumeb.pdfIn PDF document text
    • http://files.risingachievers.org/uploads/1/3/0/8/130813524/gofaruz.pdfIn PDF document text
    • http://files.ayurvedabarcelona.eu/uploads/1/3/1/4/131437012/luforalawek_sejoromimese_matuzop.pdfIn PDF document text
    • http://files.tresjalapenos.com/uploads/1/3/1/3/131384281/3c8e4341a967acf.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/1/0428/5913/5132/files/nufetevagab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7451/files/48478012079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/vuxugedutivigavolebamefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/worasume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7930/2296/files/jozowezirujerelevelop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/66346836992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/wulawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/2457502498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/vilabewexixedep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/38691581072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/57492182631.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_off00007d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D53 4700 bytes
SHA-256: 72c05d84699db811602473cacc2d9a1ff97ef645ba1120b18a3c4f9a36f1f791
font_01_sfnt_off00008d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D79 10112 bytes
SHA-256: 96557134c4bef8ee385689f9ca3815fb76ffcbe08022a16cc35079f2631e69b4

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