Malicious PDF — malware analysis report

Static analysis result for SHA-256 348cf350816857db…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 13:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c642bf4386ea40d5ea80bc39640f358 SHA-1: a4ac9f329d196e732a15b48096289a3f374b3609 SHA-256: 348cf350816857dbc6eda66bd3764e27f4212a2a254551f3015090804d3dd0a1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.com/wb?keyword=cipa%20disease%20pdf'. The document body also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, limiting the analysis of further stages.

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.com/wb?keyword=cipa%20disease%20pdf
    • http://nemivurav.crookcountylibrary.org/uploads/1/3/1/4/131407227/rutedifexeseke.pdf
    • http://files.prototypesportsperformance.com/uploads/1/3/2/6/132696580/2540775.pdf
    • http://files.hotelsinischia.com/uploads/1/3/2/6/132695633/jemuba_fojekijamejut_poradiru_muraxupe.pdf
    • http://fovabas.turlocktransit.com/uploads/1/3/1/0/131070356/4954615.pdf
    • http://files.childrenfirstcurriculumusa.com/uploads/1/3/0/9/130969971/3204841.pdf
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/the_college_writer_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/3183/7344/files/gufosevolevizowudalifiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/assignment_abroad_times_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7749/files/41509771637.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/3857039691.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/xexisawabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/magisterium_livro_5.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/67180089683.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/pabofudavin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/8060/5077/files/fisiopatologia_asma_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/nogexafujigele.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/6025525643.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/canada_visa_application_form_in_oman.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069eb.bin
c064f225be62071c4dd72dfe553d660fffaff6a49b28d1e187bffdacee0ace1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EB 4812 bytes
font_01_sfnt_off00007a55.bin
5a60f4c0c76a09adf89f3ed5af4edcc090fb1dc04b98492569ee50f231916cd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 10420 bytes

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