Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb92ac37c3dd7e00…

MALICIOUS

PDF

34.8 KB Created: 2020-08-19 00:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0e75bede7408f73ff6f904899ee45b6 SHA-1: ef1931b1386b93050780076f126cc4315ed14b2d SHA-256: bb92ac37c3dd7e006979ef14ebf41f7643d87a008dad12bc07adf061ccf69fe1
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains a URL that matches the redirector link found in the heuristics. This indicates the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, limiting the analysis of the exact payload.

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=accomplishment+report+in+mapeh+6
    • http://rikatonu.isc-shippingconsultancy.com/uploads/1/3/1/1/131163667/7017529.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53978683100.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/61117145067.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2347/files/9730509260.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7011/files/megiduvujuxamerel.pdf
    • https://cdn.shopify.com/s/files/1/0435/7803/2296/files/the_secret_to_attracting_money_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/porosago.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1959/files/approved_document_b_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/nevumagemaferabefijiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8045/8144/files/42040329687.pdf
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/bsc_nursing_admission_form_2018_ruhs.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/54595884410.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_off00004dac.bin
6c570be15a06b3837904760f5cd9849eaf85e66f45105528d90b0864d06620ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAC 5316 bytes
font_01_sfnt_off00005f8c.bin
0b25a9a522df6dff2e291f593dea996a1106923d7a69270b9652af92ffc2a184		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8C 9076 bytes

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