Malicious PDF — malware analysis report

Static analysis result for SHA-256 064b9cc2513a2d5f…

MALICIOUS

PDF

33.3 KB Created: 2020-08-21 21:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1c753e6cfa1b5b7c9c3a2da665adb26 SHA-1: 1dc16e66b8aacc8f37a6cab3e1f9dd215682c527 SHA-256: 064b9cc2513a2d5f7bc92a85d8943e1ee03581c4994721fc4bd101c589e1c975
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a harmful site. It also functions as a link farm, embedding numerous external links, many of which point to PDF files hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=open+court+phonics+worksheets+first+grade
    • http://dukewajo.shannonsstudio.com/uploads/1/3/2/6/132683292/9128695.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/winebalokisobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2983/files/aditya_birla_capital_insurance_policy.pdf
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/zijazuvizovumaguxef.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/sap_abap_for_hana.pdf
    • https://cdn.shopify.com/s/files/1/0431/0541/9418/files/simple_present_past_future_tense_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/tobogup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/introduction_to_entrepreneurship_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/59638753211.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/11478101903.pdf
    • https://cdn.shopify.com/s/files/1/0439/0843/2040/files/sample_answers_performance_appraisal_questions.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_off00004353.bin
b43ee19aeb2ee2c8741706db765177e850b5be18aefdb09bcaa2ca515bdf9f46
pdf-font-stream PDF embedded font (sfnt) at offset 0x4353 5568 bytes
font_01_sfnt_off0000564b.bin
03df80fd35d2a5364ad2f4e36e78c1e1962dd7986c13f5a1ff1feb06cbc9e3f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x564B 10168 bytes