Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d64bf8da6765d4…

MALICIOUS

PDF

45.0 KB Created: 2020-09-13 01:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e62259a2a8c6d1c82f09894132b4883 SHA-1: ddde2c79e0e05b6798f80a9f495f2388ad7e60f2 SHA-256: 38d64bf8da6765d46353241266e79372d66ea1ff5b772ddd8a99a8e3b530e93d
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.link/pify?keyword=hunter+x+core+wifi'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on 'static.usrfiles.com'. The document body, though heavily obfuscated, contains references to these URLs, suggesting an attempt to lure users to malicious infrastructure. No scripts were extracted, limiting further analysis of the payload.

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.link/pify?keyword=hunter+x+core+wifi In PDF document text
    • http://files.psychotherapy121.org/uploads/1/3/1/0/131070633/mikurorivurari_wekalire.pdfIn PDF document text
    • http://kuvuwit.bornadventuregear.com/uploads/1/3/0/8/130874175/0e8fdc62e.pdfIn PDF document text
    • http://files.emotionallyfocussedeating.com/uploads/1/3/1/3/131381772/xaraxalujag_ledazowajoso.pdfIn PDF document text
    • http://soxadad.susiegourlay.com/uploads/1/3/2/7/132710712/e7a4cd3fa1e3.pdfIn PDF document text
    • http://files.ruggedmountaintaxidermy.com/uploads/1/3/2/6/132696154/kinumarezoda.pdfIn PDF document text
    • http://files.petalcup.com/uploads/1/3/1/3/131398479/gebober.pdfIn PDF document text
    • http://files.neusgilcortes.com/uploads/1/3/1/4/131406558/9812065.pdfIn PDF document text
    • http://files.mikebernalmedia.com/uploads/1/3/1/4/131408256/faa484a.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://static.usrfiles.com/ugd/e80f4c_dbf3f28faa6c4ee0bd3c4237c930291f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d17a12ab3c924693bdab35d794cb1d11.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2994dd_5ec833ac62bc4fe7af460a0895811b78.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce4b7c_f3c8e170936044c2a9e7c90b955c371d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3b6424_dfd6e036ced045aca1bef1383885a195.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76156b_1ca2573b7d114ad093fd17d7fd6f7d12.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1cc7e8_e442c9f6ae744d918cafbd6dff496326.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E3 4460 bytes
SHA-256: b66a5bb3d34e781645a72c99ff2d42beecac02b3d74c4cf6a849a72edb356619
font_01_sfnt_off00007123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7123 11508 bytes
SHA-256: 1857ab1084e4b34d03cc70f9ff500d9fad7cc995e72df5ef6684655372df5c03
font_02_sfnt_off000097e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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