Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc59eeda9c1a605…

MALICIOUS

PDF

62.1 KB Created: 2020-08-31 10:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df71daef93f7bfbc2d29cbd6f17e0946 SHA-1: 040c0395d0bb850d38817eb5cc75fae1ce76bff5 SHA-256: ecc59eeda9c1a6057707521524a1c30d7914e1c52b2b51f3d04dd1cae81a3047
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=tvcsa+coronel+oviedo+en+vivo', which is also listed as an embedded URL. This suggests the primary purpose of the PDF is to redirect users to a potentially harmful external site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/wix?keyword=tvcsa+coronel+oviedo+en+vivo
    • https://static.usrfiles.com/ugd/fa32a6_06b5a067db6e474a8ac3bf998fb0ccab.pdf
    • https://static.usrfiles.com/ugd/913720_73e1acc1725d4505bc3326f61ef105ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_25ce794ea87541828f2e8ce8877a5f8f.pdf
    • https://static.usrfiles.com/ugd/191a6d_6d4c5d3e37384ddb8d4c09e5d7f46b25.pdf
    • https://static.usrfiles.com/ugd/6df952_2d0b5106c7004734a47d005dac465743.pdf
    • https://static.usrfiles.com/ugd/b8c837_25286c4c53824c33bd323f6e63ff0e53.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e31703808bf4874b7dd69aadd26b9a4.pdf
    • https://static.usrfiles.com/ugd/575363_69a50cc79a314121ac3fdccccefe2fd0.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/tixubozekuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/batupiwewigakotafijobuto.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/abnormal_liver_enzymes_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/gopobe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/79556046331.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/buwasovediwomeme.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/affidavit_of_heirship_texas_form_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/cahier_de_vacances_gs_cp.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a0c.bin
73539583c34474f2ee939104b46720bb81c6798b6c66b67194b6d150af431f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 6676 bytes
font_01_sfnt_off00007ae2.bin
41666c82bf252d77933c272dd8a47d27d4b96e32c187c1b05bde01320b857ad7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE2 4940 bytes
font_02_sfnt_off00008ba9.bin
e503e64d91f320f27f58a2f859e34a9c616d7c5d4c359b50603c2f4456ca8080		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA9 7596 bytes
font_03_sfnt_off0000a1c2.bin
2c4a1fd66039a5dcbae01fc33eef4e343e40c4b3b169b7873ad46cb2cd101558		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C2 11800 bytes
font_04_sfnt_off0000c86b.bin
dd11ce870b97144040c71364173356552c7e0ff74ddb4d3dc975df2f2fb9cae5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC86B 17280 bytes
font_05_sfnt_off0000e0b1.bin
1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 1736 bytes

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