Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a94f0559f7f3682…

MALICIOUS

PDF

59.2 KB Created: 2020-08-06 19:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4c5b1c28e464dfcc109017e6fbe4140 SHA-1: 6de75f0ae067f66643c5f7181de4a379bcb3e3d4 SHA-256: 5a94f0559f7f36820e7a28f78be1dd6862a1d1adf469d8c327079300a046106e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for free book downloads, a common phishing tactic. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector suggests the intent is to lead the user to a malicious site.

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/pify?keyword=emerald+tablets+of+thoth+book+pdf In PDF document text
    • http://files.inthetote.com/uploads/1/3/1/3/131398424/9898084.pdfIn PDF document text
    • http://files.wethersfieldwoolfarm.com/uploads/1/3/1/4/131453989/5892314.pdfIn PDF document text
    • http://files.kouturexprice.com/uploads/1/3/0/7/130776500/keruketosuwi-wiwajunu-ruwixuwi.pdfIn PDF document text
    • http://files.photographytoursatnight.com/uploads/1/3/1/4/131437295/5184195.pdfIn PDF document text
    • http://files.artvision.vip/uploads/1/3/0/9/130969681/3337761.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/1/0438/8945/9368/files/carpentry_and_joinery_volume_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29121996303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/the_clerk_s_tale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/87902307689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9064/1047/files/verufimuvababugemami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/540_2ez_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/xajobatususoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9113/6422/files/edit_metadata_freeware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/98403816949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/68943470335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/japepifosudupud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/29269397683.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000888b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888B 5440 bytes
SHA-256: 8452034173023ea9eba2c1413cd798d85967a6c1f70577637bd12b21ab1d9169
font_01_sfnt_off00009ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD6 11036 bytes
SHA-256: 63cff72e43d1b00c4c3ecaf7e3239ab517131dbfc439dd1593ed69928fe55897
font_02_sfnt_off0000c02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC02E 19396 bytes
SHA-256: 3ace345ac4d1ca9d6f6c80f6392cccca83767bfe61b2a3ef6475dbc230571766