Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f5cea9fbfc1f22…

MALICIOUS

PDF

37.7 KB Created: 2020-08-11 13:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c5929ad7bef594d945df545d2030c59 SHA-1: 02b25d7ec7b82aad5548c7baa6779051e138470c SHA-256: 84f5cea9fbfc1f22c27d5c2fdc93a02c90ab4e078acca8c6e8f351584d1f5d39
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains text related to 'free download' and the malicious URL itself. The ML classifier strongly indicates maliciousness, and the heuristics point to a link-farming and redirection attack pattern.

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=free+download+assamese+dictionary+pdf In PDF document text
    • http://files.heartyliving.co.uk/uploads/1/3/1/4/131454766/616995.pdfIn PDF document text
    • http://files.mindfulness-et-sport.com/uploads/1/3/1/4/131483069/ziwew.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/1/0428/0143/0695/files/72595848903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/angular_5_documentation_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/jizaz.pdfIn PDF document text
    • http://files.bmaj.rotherham.sch.uk/uploads/1/3/0/7/130740517/5197443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1048/2591/files/test_file_download_http.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/68990802173.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/gukeluviriwexig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2381/9164/files/90857949698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/ripabaratitidege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/fb_auto_friend_request.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_off000055ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55EF 5448 bytes
SHA-256: 80c275f83b6091aa162a6ee2c0905affaedb442b2bfaa20b9013438fad06cf82
font_01_sfnt_off0000687d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687D 9896 bytes
SHA-256: 8a7cc594af0adeaa52a34740fb4742ef2468cf88080f8d21bc103d92da4c1168

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