Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a5741d28c56425…

MALICIOUS

PDF

47.3 KB Created: 2020-09-17 08:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03333fdf15cb6c4dc2dff2274bb465e0 SHA-1: 1a30e0e7e26ba734cc59503d9e1f63aa9d530017 SHA-256: 79a5741d28c5642560686235da27dbbe5eefe5c577c2826c6cf86ca2fd96fcff
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=the+artisan+soul+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/wix?keyword=the+artisan+soul+pdf
    • http://rejibuket.hudsonpreschoolparents.org/uploads/1/3/0/8/130814562/2859263.pdf
    • http://mejawez.georgebrowning.com.au/uploads/1/3/0/7/130776031/a35a32709417c9.pdf
    • https://cdn.shopify.com/s/files/1/0470/8807/4910/files/22992158483.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/c_programming_language_multiple_choice_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/40026314921.pdf
    • https://75df4956-6051-4743-a743-8ae35b767f1c.filesusr.com/ugd/0fdb6d_239b97dc48154189998ce6b23e3def73.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/lazikinudizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/winibasewomaxurukeserotu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6077/1481/files/99422106241.pdf
    • https://cdn.shopify.com/s/files/1/0459/7389/7383/files/batman_hush_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/fojexiguzomutomabapa.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d15.bin
f01327bf9495f9e1886ed03b81abb37d9a41d55a2832dbbff82f62924a49f3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D15 5080 bytes
font_01_sfnt_off00008e57.bin
1483fc1d8fd28a973227f51ef2fc432c4431d4b22243c1d8d65fd41fe96c920d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E57 10060 bytes

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