Malicious PDF — malware analysis report

Static analysis result for SHA-256 019a3182603da1bd…

MALICIOUS

PDF

36.6 KB Created: 2020-08-29 21:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24196130d8526e9a8a8dd66bec1804a SHA-1: f51c4d01c67c359bb843b907ca2ae4c7d2e9c8e1 SHA-256: 019a3182603da1bd8e97c511ecb8f533beaa4e92d0491a9c334a7cccf9b2d74c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier and contains a link to a known malicious redirector. The embedded URL, 'https://ttraff.ru/wix?keyword=%25D0%25BF%25D0%25B5%25D1%2581%25D0%25BD%25D0%25B8+%25D0%25BE+%25D0%25B4%25D0%25B5%25D1%2582%25D1%2581%25D1%2582%25D0%25B2%25D0%25B5+%25D1%2581%25D0%25BE%25D0%25B2%25D1%2580%25D0%25B5%25D0%25BC%25D0%25B5%25D0%25BD%25D0%25BD%25D1%258B%25D0%25B5+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C', is the primary indicator of malicious intent. This suggests the document is designed to lure users into clicking the link, which then redirects to a potentially harmful destination.

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.
  • 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/wix?keyword=%25D0%25BF%25D0%25B5%25D1%2581%25D0%25BD%25D0%25B8+%25D0%25BE+%25D0%25B4%25D0%25B5%25D1%2582%25D1%2581%25D1%2582%25D0%25B2%25D0%25B5+%25D1%2581%25D0%25BE%25D0%25B2%25D1%2580%25D0%25B5%25D0%25BC%25D0%25B5%25D0%25BD%25D0%25BD%25D1%258B%25D0%25B5+%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/momuzukanagixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/lepanidakujop.pdf
    • https://cdn.shopify.com/s/files/1/0430/6488/5402/files/wofivusuwu.pdf
    • https://static.usrfiles.com/ugd/b8c837_b47c0721ac234d118d943dcd9daec2fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9094cecce29413e8dbf969416a669a0.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_2622c27289c74049bee1ccdb772e09e6.pdf
    • https://static.usrfiles.com/ugd/af0aa9_9c28551cdc9b4248996365361912ed5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_729d092be7254e4cacead38842b70740.pdf
    • https://static.usrfiles.com/ugd/cac9e4_ad958491c5db49f0be02d3cdd2f7d1d0.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_off00003d54.bin
6143279a8a9e09eba3b1a0ee47624f56b339692c673a341170f27597a75cc1c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x3D54 4980 bytes
font_01_sfnt_off00004e2f.bin
0e6af121d9672d9833b3bb32fb1fecd207c2431d6eeeedca455a26e06359989f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E2F 12292 bytes
font_02_sfnt_off000074e5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 4324 bytes