Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3c5f1be97de836…

MALICIOUS

PDF

60.2 KB Created: 2020-08-12 05:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64859e9e7994d9cac68b64f60da6a6ef SHA-1: 1bf15c56d54b06a8642f06bc500650216bde475b SHA-256: fd3c5f1be97de836493c29779c6b2d0e2a07b0820b691f8b76baa109a995dc4d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The PDF also exhibits characteristics of an SEO link farm, with numerous links to external PDFs, likely to improve search engine ranking for malicious content. The primary attack vector appears to be tricking the user into clicking the malicious link under the guise of a free download.

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.com/pify?keyword=bhagavad+gita+in+english+pdf+with+meaning+free+download
    • http://files.meredithmunro.com/uploads/1/3/1/0/131070192/xogafokudukarule.pdf
    • http://jekujogi.ucmatubc.com/uploads/1/3/0/7/130740069/f31be851fc737.pdf
    • http://vibolivo.shawnforever.com/uploads/1/3/0/7/130738524/didizivenefiba.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/41066831627.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/new_line_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/noviwuvado.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/lebitamakarukusoxopariru.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/43066242314.pdf
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/tunajerulonafuxagokafusi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/exercicios_de_bissetriz_de_um_angulo_8_ano.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/dasafexeduwetifepovegix.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/94114689658.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/57074879472.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8349/files/wakaxukixedunibiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/79611483499.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_off0000ac93.bin
451de6efa56df45e0a18ca96fddbb974cd718a1ae2af1a03aa0081d69a5d1f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC93 5656 bytes
font_01_sfnt_off0000bfb9.bin
ae1d1f59ee6cf3251ed0dc9ba99075f6f5ad3c509fda1babd6df17e9a7b2cbbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB9 10704 bytes

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