Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee58487b48ad11c9…

MALICIOUS

PDF

44.7 KB Created: 2020-08-20 14:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1f578bcdace616f8da7981b96f2e9cf SHA-1: 75f3c6e0e55d904067be701cf011f046018ba4e7 SHA-256: ee58487b48ad11c9ae0ed1c0ead9ceb7fa9dcdfbf1316564cd98c0b43950f53e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with one pointing to a known malicious redirector at ttraff.ru. This suggests the document is designed to act as a link farm, attempting to direct users to malicious websites. The ML classifier strongly supports this assessment.

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=empirical+approach+pdf
    • http://files.kafyeblaan.com/uploads/1/3/2/7/132710779/xikufigowe.pdf
    • http://files.thatwallpaperstore.com/uploads/1/3/0/7/130740391/88bf59cecbaad.pdf
    • https://cdn.shopify.com/s/files/1/0440/6942/1206/files/65690484708.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/rewan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/business_letter_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/8._snf_sosyal_bilgiler_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/82807845666.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/active_and_passive_voice_present_exercises_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/2016200603.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/cambridge_key_english_test_4_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/57423440454.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5886/files/58167790105.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8477/files/42188574625.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0432/4248/7963/files/halloween_division_worksheets_5th_grade.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_off00006f57.bin
9df7fac4132ae0db1c1b034d9d1c7c9fef754b26ba74859752544e53e56a05b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F57 5172 bytes
font_01_sfnt_off000080bc.bin
1e242a7312f20f26acda422c05780796245e6eccad9438bd7cd22b15c1b19df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BC 11388 bytes

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