Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f832854a216ae50…

MALICIOUS

PDF

40.7 KB Created: 2020-08-18 17:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6a98d5362b1491856c0e671f0fc8f85 SHA-1: c82c8aacf23f4fee04e4cf8fef504ef22fe1a8f9 SHA-256: 4f832854a216ae508352916b97bad059020bf7cd87cd5d14775660e7db18faf2
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure related to an 'answer sheet of upsc mains exam' and includes a call-to-action button. It embeds numerous external links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.cc/pify?keyword=answer+sheet+of+upsc+mains+exam'. This suggests the document is designed to trick users into clicking the malicious link, likely leading to a phishing page or malware download.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=answer+sheet+of+upsc+mains+exam
    • http://files.feedingyourselfwell.com/uploads/1/3/2/6/132683070/tejukaf-dajet.pdf
    • http://files.junkremovalvegas.com/uploads/1/3/1/4/131406717/mebewokadowadej_jakenobub.pdf
    • http://files.pleasuresilb.com/uploads/1/3/0/9/130969944/38a61c410bb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/29989490955.pdf
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/asymmetric_encryption_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/sunekinusutugedovigaposob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/24726740421.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/isaca_information_systems_auditing_standards_and_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0452/8193/5522/files/reading_and_writing_11.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/83405885330.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/asset_management_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0444/3042/6278/files/bridal_chorus_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/77125298749.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_off0000612c.bin
b827103531f789cbb1c783273f4d46bb850214f58bf69aa1cb50c76c97da0f37
pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 5372 bytes
font_01_sfnt_off0000735e.bin
ce812fcdafc06a5161d069aad4a7581a3944293bb27ca5884e03366d17a4e557
pdf-font-stream PDF embedded font (sfnt) at offset 0x735E 10128 bytes