Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccdc90ceb2b5beb…

MALICIOUS

PDF

37.7 KB Created: 2020-08-22 21:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb7c5b211db910442736f9a6700eb38e SHA-1: 79c06df3161a421878bd621ad4bc382b9c280af9 SHA-256: 5ccdc90ceb2b5bebeb1924d03908298866ec8214b018080efe5a1259cf8b6dba
234 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its use of a redirector link disguised as a lure for "fb video er hd quality". The document contains a large number of embedded links, many pointing to SEO-optimized PDF files hosted on various domains, suggesting a link farm or phishing operation. The ML classifier strongly flagged this PDF, and the presence of a browser extension installation lure indicates a social engineering tactic to potentially install malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=fb+video+er+hd+quality In PDF document text
    • http://vutuba.royalmarineser.com/uploads/1/3/1/8/131871787/zamazarasa.pdfIn PDF document text
    • http://files.hundojaya.com/uploads/1/3/1/6/131637853/kafuterutalep_xumoxuvewa.pdfIn PDF document text
    • http://files.findingfryston.co.uk/uploads/1/3/1/4/131407547/7843120.pdfIn PDF document text
    • http://files.salemll.info/uploads/1/3/0/8/130873715/netofebap.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/1/0430/7176/6690/files/41166127495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3355/1260/files/sovukewakaxile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2091/7668/files/niguduvutuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/23723156628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/76105750485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/the_economist_november_3_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/64911531408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/83427639964.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/barrierefreies_bauen_din_18040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/ecological_and_economic_importance_of_bryophytes.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_off000056bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56BC 5116 bytes
SHA-256: 9a5d1c26a31831b201c075cb83a8cf5316c4e5636ab2178b173e7ef4ad6f02ab
font_01_sfnt_off00006825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6825 9900 bytes
SHA-256: 322871f6ecaf42bedfa5b4f57c13389c5713a94dedd9ed23fe9dedcf6e740ee8

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