Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88b0e664e8496d6…

MALICIOUS

PDF

35.5 KB Created: 2020-08-30 03:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12093851c233637baa6c9eed22be6a7 SHA-1: 2dbfa3317843b9752e33e93325e1c9a2a509a5c7 SHA-256: d88b0e664e8496d6cd947530342cb6ebd6f9a77511d85857f13f1992969a129b
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to 'Pablo escobar mi padre audiolibro' and the URL, suggesting a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=pablo+escobar+mi+padre+audiolibro
    • https://static.usrfiles.com/ugd/91e123_fb7aa6d807a643a8a0ceb2d5c009fcd9.pdf
    • https://static.usrfiles.com/ugd/5be868_00e6f5504607450ebfd23b4039ceb3b9.pdf
    • https://static.usrfiles.com/ugd/865d50_f486d3f525784faabb2b8fa7f7913598.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_e01c40a25a3a415ca0e274355f1821fe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8171/8167/files/66547084757.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/bridal_hair_and_makeup_contract.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/14963823612.pdf
    • https://cdn.shopify.com/s/files/1/0451/4293/3657/files/public_relations_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4650/files/55425818239.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/73146613245.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/4317627813.pdf
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/62013724577.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_off00004e83.bin
4380817a0024af8f4de58ec727d3b01833396af199eb54d0036a808dbcae3055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E83 5360 bytes
font_01_sfnt_off00006090.bin
ff4fe9c01f952ce3abb221415fe33ff1865fde6360234ba1f798908629518476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 9660 bytes

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