Malicious PDF — malware analysis report

Static analysis result for SHA-256 841a37d20ef2ad0a…

MALICIOUS

PDF

34.6 KB Created: 2020-08-13 02:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9033727a0978fb1bade3b8db0fd09fb5 SHA-1: 0430274c1dfc76828ef524b3eea4e2a99e4b33c9 SHA-256: 841a37d20ef2ad0af60475d83fc047199a56226f1cf4677fe3d071a622b3f93c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=more+exceptional+c+pdf+download`. This URL is presented within the document body, suggesting a social engineering lure to trick the user into downloading further malicious content. The presence of numerous other PDF links, many hosted on `cdn.shopify.com`, further supports the link farm and redirection attack pattern.

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=more+exceptional+c+pdf+download
    • http://files.spmedical-illustration.com/uploads/1/3/2/6/132695438/5277632.pdf
    • http://nemawew.hocobicyclerentals.com/uploads/1/3/0/7/130776330/9622b06.pdf
    • http://files.ashleyparsonsyoga.com/uploads/1/3/2/7/132740415/newixebomufobezofawe.pdf
    • http://rujap.smartfamilyhistory.com/uploads/1/3/1/6/131637881/4a1ca6594ee427.pdf
    • https://cdn.shopify.com/s/files/1/0437/0900/5978/files/39535144967.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/39466407396.pdf
    • https://cdn.shopify.com/s/files/1/0432/5543/1323/files/guwifemolajuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/bullet_alt_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/perspectiva_isometrica_caballera_y_militar.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/tikkun_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/biatain_soft_hold.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/51324581041.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/wusosapamuginom.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/88478406067.pdf
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/labizaberibubutupivede.pdf
    • https://cdn.shopify.com/s/files/1/0436/1427/3698/files/wibizevexofigi.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_off00004a46.bin
13582cb477a0aa580ace4f756c300eb85c5240d407fcc0461369abede1fa9f67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A46 5136 bytes
font_01_sfnt_off00005be6.bin
0e75ee323b3448edf1ac66a68d90c5ebd2e53a0c0467e93c5e805e596b4245ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE6 9860 bytes

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