Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d38c3432383ea14…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 14:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5df70eeb0a0bcc34f15ef6efb81a9bf3 SHA-1: 4b1dbbbefe295c80387a4577b7dc74a270527f91 SHA-256: 5d38c3432383ea1403c818159ee580f1296251185da9e16233209ab0e67d2869
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains references to academic topics and URLs, suggesting a lure to trick users into downloading further malicious content or visiting phishing sites. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent.

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.com/pify?keyword=roland+barthes+semiotics+pdf In PDF document text
    • http://kezijoti.aaugymnasticsnationals.com/uploads/1/3/1/0/131070493/tekapamezase-xaletowiwukaxaw-xotitukal.pdfIn PDF document text
    • http://files.norwegianmade.com/uploads/1/3/1/3/131398380/2554e3016c57.pdfIn PDF document text
    • http://rimerasox.npsfl.org/uploads/1/3/2/6/132681352/8938607.pdfIn PDF document text
    • http://files.musiclabminneapolis.com/uploads/1/3/1/6/131606392/wizamopubuwavisapabe.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/1/0432/6676/9051/files/fifitatipebaliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/nick_anderson_fangraphs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/bidinigorezun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/rajowuxomurifawakiremar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/bozazuzetejovotuxokag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/wapinasovapolojapirixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/52306594900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/64247376157.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 2

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_off000062e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 5540 bytes
SHA-256: a8074e03fcce9eef707578585b4c9a2b8b1d0e78fc7789db75298c6da5f30119
font_01_sfnt_off00007591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 10036 bytes
SHA-256: 3a3e2833968858e0f5e0b84ebfc81bdd0fc919bf8b78b236ab2b261447b3c458

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