Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc828c864ebdae69…

MALICIOUS

PDF

48.1 KB Created: 2020-08-24 21:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff455c3ccced4494cbb2bcdfd023dcb SHA-1: 58d96334b76f8dc370ecb2e13ec7b6e65993a8d3 SHA-256: fc828c864ebdae69ff8ecd93dfc9468af9d13dc0f275b09ac6ff2a544e70b1aa
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text that appears to be a lure for an annual report. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many of which point to benign Shopify URLs, but the primary malicious link is clearly identified. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=mddus+annual+report+2017
    • http://files.koreanatoledo.com/uploads/1/3/1/6/131607063/xiluvexedosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0397/files/tumor_markers_ovarian_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/pidanegozosigek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/26266289771.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/mavak.pdf
    • https://cdn.shopify.com/s/files/1/0429/8339/1395/files/learning_german_for_beginners_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/2867203169.pdf
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/health_and_physical_education_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6649/8965/files/buxajojipukagizezediju.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/adjective_lesson_plan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/35073197693.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_off00007eca.bin
87d972de2360f8518fc1055788313a6d007fbc6c4eec85c6097b5488bc4067ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECA 5364 bytes
font_01_sfnt_off00009123.bin
b1c0cf8a83a8093fa0c550a768ddb51e3a5fcdcd197cac8c25248743ef0f1573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9123 10256 bytes

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