Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b748b1f5ebd28a4…

MALICIOUS

PDF

37.9 KB Created: 2020-08-15 08:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70248ffb1f6ccec641438667dc84b3c7 SHA-1: 09b0d81610d3c7feebae029f743e064e261c0d28 SHA-256: 3b748b1f5ebd28a4d16d2bbfd10ce5524e477c9c81f005ad31d0e549981fca4e
120 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector service, which then leads to a page offering a PDF download. The document body text, though heavily corrupted, contains keywords related to medical guidelines and the redirector URL itself. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, suggesting a phishing or scam attempt.

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=nccn+breast+cancer+guidelines+2012+pdf
    • http://files.allycast.org/uploads/1/3/1/0/131070602/xugokonu.pdf
    • http://files.beyondthelearningcurve.com/uploads/1/3/0/7/130738836/f867793f7e876b.pdf
    • http://xuluji.letipcm.com/uploads/1/3/0/8/130814106/maxoviba.pdf
    • http://files.americanindianbandmusic.com/uploads/1/3/0/7/130775922/49365d.pdf
    • https://cdn.shopify.com/s/files/1/0439/1328/1688/files/99896643501.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/adblock_chrome_browser.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/60196140293.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/error_converting_data_type_varchar_to_numeric.pdf
    • https://cdn.shopify.com/s/files/1/0431/7242/9980/files/zasili.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/astm_b117_standard_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/xokidokabupudijafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44368867506.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/talafebutak.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/24891020745.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9536/files/88818599434.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/biographies_of_great_leaders_of_the_world.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/xajejalu.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_off0000536c.bin
ec837ffe6fc0fc400a2095119dd5c3f5ad7502149762c81cde2372105b18658d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x536C 5756 bytes
font_01_sfnt_off00006710.bin
d5345d65830b5eb5fd63d49c40805bff4e6b300d2fd8a5dce066c95d950a8b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6710 10420 bytes

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