Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f37f262a8fecab…

MALICIOUS

PDF

39.5 KB Created: 2020-09-10 06:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 873deb28fa2abed02587a1e9d617b67c SHA-1: 3cb8d0b31e615b157d97b9de73d8fe0e58b391f2 SHA-256: 15f37f262a8fecab35447296e8e9d83dd72075b989200a985bab737d4113e3ae
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as an episode guide. The ML classifier and heuristics strongly indicate malicious intent, likely to lead the user to download further malicious content. The primary redirector URL is https://ttraff.link/wix?keyword=catherine+tate%2527+s+nan+episode+guide, which then points to various PDF files hosted on compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.link/wix?keyword=catherine+tate%2527+s+nan+episode+guide In PDF document text
    • http://files.rodolfoangeloni.net/uploads/1/3/0/7/130776877/napasejizedokopivupo.pdfIn PDF document text
    • http://files.uconnpremedicalsocietynewsletter.com/uploads/1/3/1/4/131437247/4518692.pdfIn PDF document text
    • http://files.onceuponatimeinva.com/uploads/1/3/0/8/130874361/3153761.pdfIn PDF document text
    • http://files.saintjohnsmilton.org/uploads/1/3/0/7/130738719/gegavimamukogoxu.pdfIn PDF document text
    • http://files.hawthorneforge.com/uploads/1/3/0/7/130775242/61d99a8d.pdfIn PDF document text
    • http://files.pvtechsolutions.com/uploads/1/3/1/4/131437725/7602133.pdfIn 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/b8c837_0ec4e67aac3a43b5b02e31a3907255ab.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cf392_9c4902809642468389eadc8f14c27518.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/65e777_ca4275a1301c486592e7c7577abe78ff.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/62e2c1_a3eb0639af54413a8c05750576c8a78d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6240f8_04068971fb1542de98018fbc5430649d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1de29_e0b670c60bba4247946cc18ec56c7816.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ac51ce_f18fb704cd1344b08d1876c5a926b3fe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_84a4c545ef504f52b25e81874ff57296.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_off0000502d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x502D 5128 bytes
SHA-256: 7657901d97b8d47a0647176384c384c182a116334a5f697eeedfc5402189b5ca
font_01_sfnt_off0000619b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 14436 bytes
SHA-256: 3fae8c1958e5a9a8d3e0af3bac088f9fd65830d16d304c30f646d76c2d113aef

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