Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a203f11f56356e…

MALICIOUS

PDF

44.8 KB Created: 2020-08-19 11:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c80a75ce1635acc316757cb1d37d13ff SHA-1: 9966c143c4e5281508b168e9a08f5f6c575d3139 SHA-256: 06a203f11f56356e49c34879bedb9026c5d5750dbde029a9ed11e2aa1aa07207
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, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=bourree+violin+suzuki+book+3+sheet+music`. The document body, though heavily obfuscated, contains this URL and references sheet music, indicating a lure to entice users to click the malicious link.

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=bourree+violin+suzuki+book+3+sheet+music
    • http://files.lormasart.com/uploads/1/3/1/3/131381881/d63c58d1414.pdf
    • http://lukudo.ajaanimations.com/uploads/1/3/1/4/131482975/75b60bc8adfd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/dojavifuviloxuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/61244191073.pdf
    • https://cdn.shopify.com/s/files/1/0437/2076/9685/files/gijad.pdf
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/vawekirawefekamarukew.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/83859784337.pdf
    • https://cdn.shopify.com/s/files/1/0429/3669/6999/files/linepepanuwulakasetox.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/48762751703.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7975/files/pulling_me_back_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/34163526062.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/andy_puddicombe_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/fewovixakosezijedozo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/sutiluxaludogusa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/67424741792.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_off00005b86.bin
0b2dd7474e2f6cc81707b2d4e48a106a3f1f669ee9372fecc2343b5a2152cc6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B86 5356 bytes
font_01_sfnt_off00006da1.bin
9716c56e6ea42e19a25ddceb3d3e30ee1880047f8e44d87060970478f1a98583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA1 10164 bytes
font_02_sfnt_off00009061.bin
dcf5bf9068761a66a65f40ee5aed8df972f266ddb8aeda1fcf15af54b1a3ac9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9061 16200 bytes

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