Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8397da57a3a81bc…

MALICIOUS

PDF

46.7 KB Created: 2020-08-31 01:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 991274573b0d6d47194eff7bb548f0f2 SHA-1: 678effdf6b3aa44211d9c00869682bfb2c91ce16 SHA-256: f8397da57a3a81bc1668456371eeffcb099f6e7f6fcb80fb7902f75859418d19
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to a malicious redirector URL. The document body, though heavily obfuscated, contains the primary malicious URL and several other URLs hosted on Shopify, likely intended to appear legitimate. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=mz+berger+watch+instructions In 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/1/0464/6486/0312/files/51363619517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9798/1855/files/4464243160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/riwaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/nature_of_national_interest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/kivedufovemufaxojite.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10b11f_6a635875375d4661998857523f792d61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/824332_53d7d63c154e4989b118b3ca7cbd7bfa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d9d1f5_53b72036f51c49c89c5044554334ae68.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cbdbb6_6d5cc1c68c9340e49213d17d0e3c0aaa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bf4b339f1a4347c79ef99a2861765bba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/50c35f_53a2ddda55e14cc5bcad2dd4d3f78793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/zowejukufagovib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/lovavelavozefusilelopobub.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA9 5316 bytes
SHA-256: 91d3611b2b4a99ed2715b8770ee52c17009ff5cd4e59010f9c67b90b35ab5ff0
font_01_sfnt_off00006fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD2 1912 bytes
SHA-256: 80a4cfd859b9bb1e8faa36d0b2de836cd4647eeb869bd113d8e2047271df502c
font_02_sfnt_off00007901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7901 16524 bytes
SHA-256: b7db73cc26b9f4325bf6e449eff58c533923fcef09c69a12b7192ee929d0e85a

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