Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f38e9bf2a07aa9…

MALICIOUS

PDF

47.1 KB Created: 2020-08-11 22:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 440005163a7396b24f513ed27bb6dc47 SHA-1: d580af358bcc1b5a6e9fcf307cf7997d0e66b78c SHA-256: b8f38e9bf2a07aa9bac9f6eecaeb8dd5ff457af70d07cba08b0a549796781237
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as sheet music, which leads to a link farm. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous external PDF links suggests a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=careless+whisper+sheet+music+alto+sax+pdf
    • http://mokuwus.cruiserpower.net/uploads/1/3/1/1/131164250/4840479.pdf
    • http://files.abstractgames.org/uploads/1/3/0/9/130969151/nenikutuvo-zipiso-kedipun.pdf
    • http://files.archelps.com/uploads/1/3/1/6/131636762/tisuwoxuropu_nutexuxo_favuditupagazun_savedezu.pdf
    • http://jidoxezi.vintagefarmsuds.com/uploads/1/3/2/8/132816202/8194759.pdf
    • http://files.slhclumber.com/uploads/1/3/1/4/131406344/1069643.pdf
    • https://cdn.shopify.com/s/files/1/0435/5214/5560/files/dimozejagogujipaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/luwuzugidedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/39190373896.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vujunuvitiwowus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/human_anatomy_and_physiology_b_pharmacy.pdf
    • https://cdn.shopify.com/s/files/1/0434/2897/0652/files/sbi_internet_banking_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0321/files/96113321590.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/51755689723.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/all_algebraic_identities_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/57060083422.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_off00006ec5.bin
2f137bc9a935a29e85c4a8b74f9fa249751113008d87cc396a1e6bb183484692		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC5 5460 bytes
font_01_sfnt_off00008148.bin
2fd93aef1041214ee7a060c774bcae4cdf2d116226b42a75269dd0b6ca4fdfc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 14568 bytes

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