Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b835f9e5f2183ff…

MALICIOUS

PDF

38.2 KB Created: 2020-08-06 23:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41d9f1a7e1e090a47ef585edd6f5a9f1 SHA-1: 0e8dddb04e89e9ade0d6f094117dd9915248678f SHA-256: 8b835f9e5f2183ff432e6134c24b1318336aa7eba3b97100ee5700dc184f062c
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=list+of+adjectives+and+adverbs+for+ielts+pdf`. This heuristic, combined with the presence of a large number of external PDF links, indicates a likely attempt to direct users to malicious content. No scripts were extracted from this sample, limiting further analysis of its behavior.

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=list+of+adjectives+and+adverbs+for+ielts+pdf In PDF document text
    • http://files.thetravelinrat.org/uploads/1/3/0/8/130814858/4882030.pdfIn PDF document text
    • http://kebirip.elliottencarnacion.com/uploads/1/3/0/8/130874064/kawonogus_pufowejo_biwuga_zeserej.pdfIn PDF document text
    • http://warozu.jingwilliams.com/uploads/1/3/1/3/131378776/mimebofabigofalodibo.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/1/0434/7320/7446/files/16587158998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/pipuliru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/40958091195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/91554993309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nifafujejugafux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/turaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1986/0125/files/kuzipulijawizaropimuriw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/fuzixizun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/46167711945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5743/8101/files/32234029650.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 2

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_off000057cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CF 5364 bytes
SHA-256: e480dbc18874563ec19207a6a7463780d2db716d61962bbd71cf1e08c8e52b01
font_01_sfnt_off00006a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A29 9908 bytes
SHA-256: 27913a2882415ed91b486066ec8aff5ae9aec799ff83da4b9080549975b2288c

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