Malicious PDF — malware analysis report

Static analysis result for SHA-256 7033ea3bd902be0d…

MALICIOUS

PDF

45.1 KB Created: 2020-09-19 01:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd79b5f2915e92a52c944751082a5136 SHA-1: 6fd90669b053759085e5355c0e0e0199a6f3e5aa SHA-256: 7033ea3bd902be0d8b9e5d88c6622f47d6b8c314ede997b6ed5e4c5ec97e3b8f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.me/wix?keyword=ceramic+insulation+thermal+conductivity'. Additionally, it features a large number of external PDF links, suggesting a link farm or SEO spam tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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=ceramic+insulation+thermal+conductivity
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://abd246fc-171b-4c39-a061-905c23e02aa2.filesusr.com/ugd/9f06f8_e874f3e27ace4e1888e4875c3a7a2785.pdf?index=true
    • https://8bd8a511-3319-4961-8786-15b9965b58c7.filesusr.com/ugd/0f9ef0_321175f751bb4092907107a5d6690ab5.pdf?index=true
    • https://d37a646b-baa9-4ea5-9c8c-f038ff25ad30.filesusr.com/ugd/dad90e_bff19c77e3b44e6fb3ddbbb0c415e3f1.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/5118/6336/files/18721801681.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/wojeri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/93835923406.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/ratizulu.pdf
    • https://510f3f74-aa80-4d9c-b436-2a2dbf1991f9.filesusr.com/ugd/f99735_e036c781a02349738d58025cc3d73c69.pdf?index=true
    • https://2d67cb04-5a40-4cc0-9d4f-3071e0ab31a8.filesusr.com/ugd/decf6f_8db2b5751da44dbeb923d4f7d5329c5b.pdf?index=true
    • https://c541a17e-ffe8-4a4e-8e3d-4a3c136a1e16.filesusr.com/ugd/e481ce_644b944f83fc41888ec6c9db2a2d8df9.pdf?index=true
    • https://bc67d535-b50a-4da6-a3c6-8c729caafcf4.filesusr.com/ugd/a58502_04ead6751445449a948a4f4a57eab65b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/baxokezegitunutaralededir.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/rusavagaze.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/cutaneous_t_cell_lymphoma_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/86943653168.pdf
    • https://cdn.shopify.com/s/files/1/0452/1390/9143/files/epidemiologia_sade_maria_zlia_rouquayrol.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066c8.bin
f17f33d601bed6a21c8ecb20d45b68ea10a58f1be9662582eed9b89429256ee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C8 5244 bytes
font_01_sfnt_off00007871.bin
a8384e490a465b6465eafdf425087472cb97ff37806a5981a395d474806acd4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7871 15000 bytes

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