Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7daefe81f048b44…

MALICIOUS

PDF

44.7 KB Created: 2020-08-16 00:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97f8d19ecea3fb6b6b496e771108f3a1 SHA-1: 2642a7da3a9059ac236814f68abec7f3a2542407 SHA-256: f7daefe81f048b44901a1870dac8779d79d8283acdff96ec85ef66118555052a
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources. One critical heuristic firing indicates a link to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=marketing+exam+questions+and+answers+pdf'. This suggests the document is designed to redirect users to malicious sites under the guise of providing exam materials. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=marketing+exam+questions+and+answers+pdf
    • http://files.badgerthebichon.com/uploads/1/3/1/4/131454286/e99e621519917.pdf
    • http://files.hellenphotography.com/uploads/1/3/0/7/130776131/1669426.pdf
    • http://files.slhschoirs.com/uploads/1/3/0/8/130813701/8780325.pdf
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/prizerebel_promo_codes.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4552/files/network_engineer_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/44878581660.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/17701282078.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5557/files/tratamiento_meningitis_bacteriana.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/foniz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1877/9800/files/zotepobufon.pdf
    • https://cdn.shopify.com/s/files/1/0430/6911/2474/files/statistical_data_analysis_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/year_calendar_template_2013.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_off00006dc2.bin
c51a26ad438f7b734e821899a2300adbf176d7d9cf68afab5481d46d1df665ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC2 5684 bytes
font_01_sfnt_off00008121.bin
4d51eb6d4c3ce4fa15b6deb8e3274142b34de85737e1197d8e730d702b673d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8121 10880 bytes

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