Malicious PDF — malware analysis report

Static analysis result for SHA-256 518e62813cc4e4b8…

MALICIOUS

PDF

41.3 KB Created: 2020-08-03 04:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b059f59526658e01d3f3a1d881eb9d8 SHA-1: bc246d6a8c0f76687b8b34b6b6b89795268dc223 SHA-256: 518e62813cc4e4b8b40e9581cbffbbe10136333aef9c85157e8cfdd1ee3f1154
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a "Curtis air compressor manual". The ML classifier strongly indicated maliciousness. The document body and embedded links point to a link farm designed to redirect users to malicious infrastructure, specifically the URL https://ttraff.ru/pify?keyword=curtis+air+compressor+manual. No scripts were extracted from this sample.

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=curtis+air+compressor+manual In PDF document text
    • http://files.lenaseikaly.com/uploads/1/3/2/8/132814990/mutezagurebofug_fupanap_rugobowogu.pdfIn PDF document text
    • http://files.elegance-dessert-bar.com/uploads/1/3/1/6/131636655/183cacfff3.pdfIn PDF document text
    • http://files.hisaxfnd.org/uploads/1/3/1/4/131453494/zupavivulitinuxavi.pdfIn PDF document text
    • http://files.diamondjleatheroftexas.com/uploads/1/3/2/3/132303261/tosibemugem.pdfIn PDF document text
    • http://files.mmtaxilimo.com/uploads/1/3/2/3/132302833/wojukimize-sagiduke-datugali.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/1/0436/5549/5833/files/42368705362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/73761964131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7244/5846/files/felaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/67197618860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/pujenerenekibifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/pupumajiredizanebili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/18859551854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2654/4802/files/famonetubebinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4796/5087/files/reiki_master_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7197/9172/files/4282758544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9613/8137/files/boket.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 5

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_off000064f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F2 4984 bytes
SHA-256: d3caf364aadb1b197d25b5a7518f6495391925a1ecee3df97a01a1ef94531015
font_01_sfnt_off000075c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C9 10048 bytes
SHA-256: 169f16407e4597ec61a1c9959bfaa96b1495f59aef109447ef67c576fe22aaeb

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