Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9e965b68faca11…

MALICIOUS

PDF

50.0 KB Created: 2020-08-21 23:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 277b3b1f352ac613596363a2ddf345f4 SHA-1: 037e3b9d4e3235e115f0fbac5cd4afe4607efb1d SHA-256: 6e9e965b68faca1169b2261f37396695f7edd9540bbeadb21963ceeac6e05f8d
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic, suggesting an attempt to direct users to malicious content.

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.ru/pify?keyword=administrador+de+dispositivos+android+web
    • http://files.sidleystandup.com/uploads/1/3/0/7/130775942/3089407.pdf
    • http://files.afsfabillierenfroe.com/uploads/1/3/1/4/131407292/513309.pdf
    • http://files.mkbergh.com/uploads/1/3/2/3/132303013/wazifezimeg.pdf
    • http://files.stmichaelskalida.org/uploads/1/3/1/3/131381607/gebelunov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/gozoxojuvewaxewozob.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/49882312782.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/zinus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/16441069124.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/ganesh_aarti_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/6562/2184/files/76324371694.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/14718749099.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/2596902398.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/35076972930.pdf
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/pisetotojojimumujusaleka.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fa6.bin
8ffa0a7012bdbc979f05a63d7f75e73875829669dce55cdcbc4c4d8d4cc6eb8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 6832 bytes
font_01_sfnt_off000070f6.bin
cb29fc949fb055d09a669269502372ec930d93e8645751cbe9f5ac1b2cc4b39f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F6 5352 bytes
font_02_sfnt_off0000831c.bin
36d7a79eb181d48041f2299ad3b07a3ba4b98658ce51a8cd80986ec107779019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831C 9816 bytes
font_03_sfnt_off0000a4e5.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E5 16312 bytes

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