Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba936c5ed1f2651…

MALICIOUS

PDF

45.0 KB Created: 2020-07-30 04:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4200c61aea403c5f656d05bcffdcfb9a SHA-1: 72f09be7021effaecb70258148c00068cc749c13 SHA-256: 1ba936c5ed1f265106fcea7803fa95b801d41afc4296d447fb4ff27a66596487
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary URL, 'https://ttraff.ru/pify?keyword=nonparametric+statistical+methods+2nd+edition+pdf', is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'Nonparametric statistical methods 2nd edition pdf', suggesting a lure to trick users into clicking the malicious links under the guise of academic 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=nonparametric+statistical+methods+2nd+edition+pdf In PDF document text
    • http://files.beckerpark.com/uploads/1/3/0/7/130738666/radebobobe.pdfIn PDF document text
    • http://files.paintyourheartsout.com/uploads/1/3/0/7/130738700/bd2de04c6c25a.pdfIn PDF document text
    • http://files.princessinthemirror.net/uploads/1/3/0/7/130738553/e13102bb.pdfIn PDF document text
    • http://files.thewriteblend.com/uploads/1/3/0/9/130969148/zajonurukusuzen-dopuladal-lelekajox.pdfIn PDF document text
    • http://files.revolutionpapers.com/uploads/1/3/1/4/131413905/d8515c4.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/1/0429/9928/3861/files/23819970757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2783/2733/files/49236054884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/70952947484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/17892714870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kovutuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/digexubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/94850249212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/lagusiber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/modexoboxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/sanizesozisikosawodiv.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_off000073f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 5284 bytes
SHA-256: 3db14cc6a0ba8fbbfcc62122e84ebed508a3dd19b50dcd17fc7cd56f35e66a18
font_01_sfnt_off000085b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B7 9732 bytes
SHA-256: 34d90d734b95c49cd6c4342b0629ee594dccab5fa04d139efb04683c4b6b2dab

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