Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca37d307d77135b…

MALICIOUS

PDF

47.7 KB Created: 2020-07-30 06:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3e0619bbcd86fbefe75c6845f9694e6 SHA-1: e53a1b6b584e496f7873f7de5ad676c7e898d6b8 SHA-256: dca37d307d77135b8fb85bb8fc265e0af070b9798c67525f6fbe3d5cd3cc4a54
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links pointing to external PDFs, including one hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, appears to be a lure related to 'Javafx tutorial'. The combination of these factors strongly suggests an attempt to redirect users to malicious content.

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.cc/wb?keyword=javafx%20tutorial%20for%20beginners%20with%20examples%20pdf In PDF document text
    • http://files.itzelmusic.com/uploads/1/3/1/3/131379118/pikenatizu-jakupovokaf.pdfIn PDF document text
    • http://files.finewillrockthehouse.com/uploads/1/3/2/6/132695732/tavajulize.pdfIn PDF document text
    • http://files.lotekstreetart.com/uploads/1/3/1/4/131437005/8e33656644c2.pdfIn PDF document text
    • http://files.termarkleather.com/uploads/1/3/1/6/131636697/4997465.pdfIn PDF document text
    • http://files.dogsbydana.com/uploads/1/3/1/1/131164239/defikodijoke-taleli-narobefize-riwiwovatogajok.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/1/0434/5223/5938/files/buxojelabodibodotanomowot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6124/files/resobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/merolefoditigisugamuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/70766020428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/94007385280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/11842920131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/botolewapaniwid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/nagubozopopunafuxoxupola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/xevuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/rajivolubujobonovenuduvag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/tabakil.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_off00007a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A54 5684 bytes
SHA-256: 777dbcc7c1c95242d28bdf03d51ee139bd9350ad2d38ebe9f43938bf5ca38594
font_01_sfnt_off00008d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8D 10320 bytes
SHA-256: e1c423a896cb5972640909c8564dc9d745402cfc1302c2f962eb82a4c064f6f0

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