Malicious PDF — malware analysis report

Static analysis result for SHA-256 42336401a7c32d98…

MALICIOUS

PDF

35.2 KB Created: 2020-08-09 14:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd7e24dc37115a3796ab8336e84f48b8 SHA-1: f5d7995fe4c5df9cc794c4d1eb4f917449e9ba63 SHA-256: 42336401a7c32d9803f58b8aa8d1d91b446f9881b8ee3d6af3e4b36fe86a6ec6
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Standard bank loan application form pdf' and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious sites.

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=standard+bank+loan+application+form+pdf
    • http://jutajev.aperfectprescription.com/uploads/1/3/0/7/130739379/7182152.pdf
    • http://files.smilesbyrane.com/uploads/1/3/1/6/131606256/ripekofolosuz.pdf
    • http://gagafon.liquidlightbodyworks.com/uploads/1/3/1/3/131398020/gimem.pdf
    • http://files.roejendradesigns.com/uploads/1/3/1/4/131409037/a8a5d2ba.pdf
    • http://files.rec-writer.com/uploads/1/3/1/0/131069934/zubapiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/nozaxavumebilowisiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/jikewilijawejezofixuvebak.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/marianne_faithfull_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4092/3048/files/programmatically_annotate.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4586/files/66112679973.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/90718854371.pdf
    • https://cdn.shopify.com/s/files/1/0450/6848/4758/files/libro_numerologia_tantrica_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/migikuruvudesosifumet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/learn_python_programming_the_no_nonsense.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/24369051138.pdf
    • https://cdn.shopify.com/s/files/1/0438/0485/2386/files/ubuntu_install_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/mosugedimilaturad.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_off00004cbd.bin
7279cb74f49f1017d289800c0e6adee0325d8319f20bbc657b49531831540f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBD 5432 bytes
font_01_sfnt_off00005f21.bin
c6a58d020c23462a78b4f599be94d76dd67fbf18b385c790ddc2c055047242d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F21 9564 bytes

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