Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03fb200afbabad5…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 18:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f036a0a5019c3569b3b0fed9fc01bced SHA-1: 416de8f84b31b8fa91cf38b6d3e84b053433a681 SHA-256: b03fb200afbabad5498b0bee543e47f02583f21f8f7651e78d1fca3739ee9ec5
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to a link farm hosted on static.usrfiles.com, and one critical link to a known malicious redirector at ttraff.cc. The document body, though garbled, contains the text 'Invalid email address format message' and the malicious URL, suggesting a social engineering lure. The ML classifier strongly supports the malicious verdict.

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=invalid+email+address+format+message In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/dad90e_6370b149e2204e3fbc06d55ab32b164f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5fd5c1_4929f63ad5ae49efbafba9bdb0042e46.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_41cd3becc36648eb92556877ce68099e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_aafbd17cb98245e3a07b59be7b774e56.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f09a9d_387bc6ae6b7f495ea6d3b7f373728593.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_127b7f64e5fe454c97d8858f93b75350.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b5472a_3d46fc6ad01c48409827707b3dc19c16.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b134deba61ea41e5b8d411481a5f561c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/12daa7_5ad8c32f750345d9917b4bf65477d263.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd3290_4419f81878684743b357c5474f09decb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c33cdb_7e771a031e2543ca9d6d5be16e4983ce.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/834936_84b3b0931aca45a3b14f9e1322211b86.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/68014814787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9140/9562/files/savazejuvigivuriri.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_off0000659c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 5224 bytes
SHA-256: 6c201792395b47faae77dd8a1828416e7b51bab59bca0139e8119a4cf840d528
font_01_sfnt_off00007752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7752 10860 bytes
SHA-256: 0600d41d6dc2e9016e733f34597d09135dd0d32cff43ad7dd0f03f91a09059fb

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