Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a962bc0a59cbb8…

MALICIOUS

PDF

51.5 KB Created: 2020-08-11 00:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586a10c92660e35689505e1e542130c7 SHA-1: 2ab822f51094f25986a0b565e7a1d208dcc2bbdf SHA-256: 00a962bc0a59cbb803a9c8748740c2884882cb880e6ede541c49e0da4652079a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution: Malicious Link

The PDF document contains a large number of embedded URLs, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/wb?keyword=reflection%20theory%20pdf, which is linked to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking through to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/wb?keyword=reflection%20theory%20pdf
    • http://files.morethansoulfood.net/uploads/1/3/2/3/132302973/timuf.pdf
    • http://files.thomaslabandz.com/uploads/1/3/2/6/132695714/7c31ef8e7445c24.pdf
    • http://dapevux.lasvegasorientalmedical.com/uploads/1/3/0/7/130776485/918703.pdf
    • http://bepena.nakedyogadallas.com/uploads/1/3/0/7/130738731/xofilox_gadilubagefo_kigokubawiwi_sakepuxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/bikini_body_training_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/874991495.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/fajojivuromowezux.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4731/files/cambridge_pet_speaking_exam.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/54557307420.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/tekla_structures_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/6494902981.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/xenegew.pdf
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/76889318191.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3448/files/applied_microsoft_sql_server_2020_analysis_services_tabular_modeling.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/unearthed_arcana_5e_cleric.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_off00008175.bin
0a69b19ee3cfdaca5d2e9c08764c167c09dbd2f962984463470496611373e4b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8175 4752 bytes
font_01_sfnt_off00009194.bin
c1082aa3270c5d112b76903980a475ebba92e36cd047ad3cb2e033adfc8beb2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9194 9860 bytes
font_02_sfnt_off0000b352.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB352 4324 bytes

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