Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f39a8b147f146c…

MALICIOUS

PDF

49.3 KB Created: 2020-07-24 14:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5be202127d7e12908a0e08a1887d7747 SHA-1: a13af242214e3fdf0f4a4ca5f8021ed699f7c343 SHA-256: 63f39a8b147f146c0b5628eeca9dffef84e6ac3415b3bbc9f577d1cbfe327921
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service at 'ttraff.ru'. Heuristics indicate this is a malicious redirector and part of an SEO link farm, likely used for phishing or distributing further malware. The document body, though heavily obfuscated, contains keywords related to 'health information', suggesting a lure to entice users to click the malicious links.

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=reliable+and+unreliable+sources+of+health+information In PDF document text
    • http://files.anthonylaurienti.com/uploads/1/3/1/1/131163492/repusomadufapu.pdfIn PDF document text
    • http://files.vancouvervolleyballleague.com/uploads/1/3/0/7/130739472/6944019.pdfIn PDF document text
    • http://files.littlefeatherfoundation.com/uploads/1/3/1/4/131407918/xanijeselipepaveli.pdfIn PDF document text
    • http://files.trailsidecountrystore.com/uploads/1/3/1/3/131383973/d6074dd10d8c88e.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/1/0429/0763/1782/files/73669189541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/xixepabujuxokugupevuvexaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/64243265518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/fedisakunut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/25410997099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/38626266298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/jibekuzitamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8870/7738/files/veponazemepodetomajub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/36593604046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/11725565071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/36724396325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/vekunerubusa.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_off000081bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BB 5288 bytes
SHA-256: 13ce56def648cb9b587b0a49a2439b7502fd12cad8200d897b180ba6d5629c2c
font_01_sfnt_off00009381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9381 10564 bytes
SHA-256: 62d3fcd17679836bb1a126a6db15b9f45b1b909350bcd631e1ba9943eee1fedf

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