Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bb6216aad631c6…

MALICIOUS

PDF

49.6 KB Created: 2020-08-19 00:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c486089d6310f6e8451f1ad79a681e03 SHA-1: 93c67ef1da41bebe6c084e8126ee21c28ea7ae74 SHA-256: 25bb6216aad631c66563a608d940e1e01c12de856e8fa2c34e249e6ea8cd9231
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding of a link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'Australia calendar 2019 pdf' and a URL that matches the redirector found in the heuristics. This suggests the PDF is designed to trick users into clicking the link, which then redirects them to malicious infrastructure.

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=australia+calendar+2019+pdf
    • http://puzoxi.r2cell.com/uploads/1/3/0/7/130738909/6654176.pdf
    • http://regavif.aston-financial.co.uk/uploads/1/3/1/4/131453870/zezizukarod.pdf
    • http://files.rmscnc.com/uploads/1/3/1/4/131453432/konozifiwuwugok.pdf
    • https://cdn.shopify.com/s/files/1/0435/5063/8241/files/kojidajej.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/geometry_5._8_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/black_metal_logos.pdf
    • https://cdn.shopify.com/s/files/1/0435/4952/4127/files/franchising_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/kovipokipunobamemibudula.pdf
    • https://cdn.shopify.com/s/files/1/0434/6983/2342/files/optics_hecht.pdf
    • https://cdn.shopify.com/s/files/1/0439/4090/5128/files/ways_to_reduce_absenteeism_in_the_workplace.pdf
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/30_beats_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0452/4628/3937/files/bilirrubina_directa_alta.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/furosemide_davis_plus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/conjunction_english_grammar.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/
    • https://cdn.shopify.com/s/files/1/0439/4090/5128/files/ways_

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622e.bin
837593b3f840389cf8f17220e260572acd031769ddd24bc51cccc5208c7fe9fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 5620 bytes
font_01_sfnt_off0000754f.bin
220756ad745eff4620b8a1f2d283a389a9d8b977a3927faf5a0a7c5b6435f60e
pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 15024 bytes
font_02_sfnt_off0000a495.bin
aed46c9af23f208f135cb03afacfd1ac790ba89857c5134c11dc43e7260cc7d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xA495 16108 bytes