Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac15caa7767ba0a5…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 20:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86729b9cfb56ed8a92d50bf1abea3dd9 SHA-1: e8ed77c8b0eb4db3f8e9442c6bfbd65a6f4f8266 SHA-256: ac15caa7767ba0a5452e5b39a5f8b08c7d59f5f9cc0094200bb15c01a896266b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or redirection strategy. The primary malicious URL identified is https://ttraff.ru/pify?keyword=quaternary+industry+pdf. The document body is heavily obfuscated and contains binary data, making its direct content analysis difficult, but the presence of numerous links points to a redirection-based attack.

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=quaternary+industry+pdf In PDF document text
    • http://files.alexbadas.com/uploads/1/3/1/4/131437335/ebe122d0.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/1/0429/5216/3482/files/8799824802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/46901473630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/command_line_merge_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/87943092436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/zobugisago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/14967261187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4313/3352/files/7382264319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/25153178681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/52777118781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/taper_roller_bearing_catalogue_skf.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 3

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_off00006410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6410 5164 bytes
SHA-256: 80a55f2bd6dbf3e495a70b1eee68e83b0b10e495d2fde8cae1999cef871860ec
font_01_sfnt_off000075b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B8 10340 bytes
SHA-256: 0628a2dbf4e5a15e2d47f8b083cd6ba002af0a1a0ade0eb9efe840349e11bfb5

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