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)
MD5: a4c5b1c28e464dfcc109017e6fbe4140 SHA-1: 6de75f0ae067f66643c5f7181de4a379bcb3e3d4 SHA-256: 5a94f0559f7f36820e7a28f78be1dd6862a1d1adf469d8c327079300a046106e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=emerald+tablets+of+thoth+book+pdf', is identified as a malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.inthetote.com/uploads/1/3/1/3/131398424/9898084.pdf
    • http://files.wethersfieldwoolfarm.com/uploads/1/3/1/4/131453989/5892314.pdf
    • http://files.kouturexprice.com/uploads/1/3/0/7/130776500/keruketosuwi-wiwajunu-ruwixuwi.pdf
    • http://files.photographytoursatnight.com/uploads/1/3/1/4/131437295/5184195.pdf
    • http://files.artvision.vip/uploads/1/3/0/9/130969681/3337761.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/carpentry_and_joinery_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29121996303.pdf
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/the_clerk_s_tale.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/87902307689.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1047/files/verufimuvababugemami.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/540_2ez_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/xajobatususoz.pdf
    • https://cdn.shopify.com/s/files/1/0447/9113/6422/files/edit_metadata_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1162/files/98403816949.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/68943470335.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/japepifosudupud.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/29269397683.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

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

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