Malicious PDF — malware analysis report

Static analysis result for SHA-256 7525661176d3fdc7…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 18:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25dab4c70edbe7d50c1608f624a8b32d SHA-1: f7c75d89e14a524b6efb8f983a9c3603b68ca390 SHA-256: 7525661176d3fdc738722362cb3d8c4ca30ef0ce98f11f047e88d60389a1566c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references to a song download, suggesting a social engineering lure. The presence of numerous other PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to obscure the malicious URL.

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.me/wix?keyword=wonderwall+oasis+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_0e2a18021ca2478e90e3c76a36a9604d.pdf
    • https://static.usrfiles.com/ugd/b8c837_166c583fa7264da5955d4ece513af4a4.pdf
    • https://static.usrfiles.com/ugd/1d64af_b0b908e9752d40feaf38ce3e70f054e2.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_a0f6383110d241259105b8bad56f557a.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/wewulologuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7703/4399/files/vexesemebodo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9086/0449/files/ratatouille_2007_francais.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/wezawalanoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/cbse_maths_text_book_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0439/3933/2251/files/4chan_co_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0458/2447/5299/files/fudurudarobepusakaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0356/7515/files/77345082610.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3019/files/35917832186.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/hapkido_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0440/7332/0613/files/audit_report_conclusion_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/tarijarubakitetosaguxisib.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/konsep_dasar_akuntansi_perbankan.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000613c.bin
3184d16bbf8d0f96ad40c5c6b0fd3913fd781c5b197ec111e698377e4513b07e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 4632 bytes
font_01_sfnt_off00007109.bin
5f6dbf817033b8aa80e882ac2bd8f1c1f63ecb7917e8869a00d99af6bb65fa6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 10308 bytes
font_02_sfnt_off00009458.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9458 4324 bytes

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