Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b825d1512c47bb5…

MALICIOUS

PDF

44.7 KB Created: 2020-08-05 02:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 937bd18db9da17da52eb7259960de20d SHA-1: 2fa25713e2996c2d0e1afbe17de7789903e20383 SHA-256: 4b825d1512c47bb506ab6e8b49298ed461d0770b00bed14553d8c923534337ea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=manual%20del%20conductor%20puerto%20rico%202018'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous links to external PDF files, many hosted on shopify.com subdomains. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. The primary attack pattern involves luring the user to a malicious site via a deceptive document.

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=manual%20del%20conductor%20puerto%20rico%202018 In PDF document text
    • http://files.destrierbooks.com/uploads/1/3/1/4/131437330/3370808.pdfIn PDF document text
    • http://files.fancyworldusa.com/uploads/1/3/1/3/131398195/vosesabugunor.pdfIn PDF document text
    • http://files.sklallamwarriors.com/uploads/1/3/0/7/130739509/16ad61921.pdfIn PDF document text
    • http://files.simply-scripted.com/uploads/1/3/0/7/130739265/1714467.pdfIn PDF document text
    • http://files.minecraftintheclassroom.com/uploads/1/3/1/1/131164358/ximuwozo-viparatexerom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1016/8744/files/21901528156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/vokogokax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/7449852734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/the_wire_season_3_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9856/9888/files/midotijukuzaxuzufije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/76122138237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/49216738524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/telebevirosalanidirep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8299/7148/files/synecdoche_new_york_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/vakagixexanedirufofepupex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/wofovuxi.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5282 5296 bytes
SHA-256: a223b10b75a4df87f7af56724a0d61d58134c457ae082209ddfd2ddee3f9d574
font_01_sfnt_off00006484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6484 4696 bytes
SHA-256: 190ed3ca2f366942097257119aba5b5d93bc68e5c3ec07997be340eb95d35fcf
font_02_sfnt_off00007131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 11532 bytes
SHA-256: 003210b7568e013750ddbe586b2b122fe398ef7522fb7016a759ac26459141cc
font_03_sfnt_off000096eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f