Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfa5a29a50debed…

MALICIOUS

PDF

39.0 KB Created: 2020-08-15 22:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 596276629bd25cb2cc0cc49367ae89c3 SHA-1: 72d173b7aa1448cdc365fcd162a319196f5ff7cd SHA-256: ecfa5a29a50debed2eeef37fc7e6daeb50a32320c2cd1ccebe7e020e33bbf954
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link redirects to known malicious infrastructure at ttraff.ru. This suggests a link farm or SEO poisoning technique used to disguise malicious redirects. The document body contains garbled text but includes the target URL, indicating an attempt to lure users into clicking the malicious link under the guise of a book download.

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=kaivalya%20darshanam%20book%20pdf In PDF document text
    • http://files.vermillioncpl.info/uploads/1/3/1/3/131380992/jomeroz-nixeborixagud.pdfIn PDF document text
    • http://files.katbundy.com/uploads/1/3/1/0/131070452/d93910d.pdfIn PDF document text
    • http://files.highbanks.com/uploads/1/3/1/3/131380146/mizuwavobaliv.pdfIn PDF document text
    • http://files.summitflash.com/uploads/1/3/1/3/131380107/pabobilebu_mixajakazewil_guvuvanemojok.pdfIn PDF document text
    • http://gepifuguz.kgboutiquedesigns.com/uploads/1/3/0/8/130873791/zevagidefexu-bibufaf-gipinexu.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/1/0444/2708/3943/files/ben_hur_movie_tamil_dubbed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4330/files/pizin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6294/3144/files/tadugesinumimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/aziz_ansari_modern_romance_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/lasizomemone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/17132895393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/95392842764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9222/0829/files/66172156665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/pisutapugum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/agriculture_biologique_en_tunisie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9592/5671/files/11157830485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/runizos.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 4

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_off00005990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5990 5616 bytes
SHA-256: b03b446842fd555c464eb2b9e03566a6f676c3a5d9641ea10d71e45250cf4da7
font_01_sfnt_off00006c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 10120 bytes
SHA-256: a29417d614718fd82873c651e6be98a3b735056b140ef320c4a1f60b74877525

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