Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9aae51915f5523…

MALICIOUS

PDF

52.5 KB Created: 2020-08-14 13:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 101b67a39039a6ea3e944152ad672a10 SHA-1: b1def27139c36e9583e3a448a527b25925bf1372 SHA-256: 0b9aae51915f55232f58f766601e359410b04ad46c582635adc043030d40d732
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links designed to redirect users to a link farm, masquerading as educational content. The primary redirector URL, 'https://ttraff.ru/wb?keyword=exponential%20function%20worksheet%20kuta%20software', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into downloading potentially malicious files disguised as worksheets.

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/wb?keyword=exponential%20function%20worksheet%20kuta%20software In PDF document text
    • http://mezixot.byhre.com/uploads/1/3/1/3/131379379/1934948.pdfIn PDF document text
    • http://files.artlynchactingcoach.com/uploads/1/3/0/8/130874063/a270c.pdfIn PDF document text
    • http://files.goldenimprintpublications.com/uploads/1/3/1/4/131454219/lijakez.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0440/5588/8022/files/36086356624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/53209994869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20785775646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/56553537399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/gababesaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/3284/0101/files/hsc_marksheet_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/9062745654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1327/0692/files/convert_to_word_arabic_and_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/nipim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7303/4658/files/87206554548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9313/9364/files/54094579132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/najovoxadalolowogefixol.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7650 4288 bytes
SHA-256: 79fdbeadad204db52044c8a52c75ac3cf710a2bc4e63c0df0108076fa5b20eb0
font_01_sfnt_off000085fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FA 5284 bytes
SHA-256: b8d68d38c0fe6e1e87a4565dfb200a09c50970e8ca57bfb8358db4a0f6e4e682
font_02_sfnt_off00009802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9802 14280 bytes
SHA-256: a23f0c88d733aa68b17b4e4c7caa79a2e59c5cb5847df11e89379c42d1e95bad

Open this report in the interactive analyzer, or submit your own file for analysis.