Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e5d9e2f7883ab1…

MALICIOUS

PDF

50.4 KB Created: 2020-08-21 08:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47fa0087196db51e297eb5b68af77e5b SHA-1: fe3c39432b862b3146d217754bcb052dcc926441 SHA-256: 43e5d9e2f7883ab11bc0c83996a8f089b2c5e4ac2e36fea76e54c9e8d8bb68ba
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure to encourage clicks. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=like+and+dislike+worksheet+kindergarten
    • http://pedodagan.thetreatmentcentersinc.com/uploads/1/3/1/3/131384635/db056f5.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5317/files/18285018196.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/lemuraxezijisagubezawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/mazejak.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/byrsonima_crassifolia.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/36560745916.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/40358150998.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/fdmr_suraj_name_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/99994428412.pdf
    • https://cdn.shopify.com/s/files/1/0440/6955/2293/files/juzepemasoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/3233487455.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/68556983024.pdf
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/zerevaxewasuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/ganurifavudakuzexexu.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_off000087fe.bin
141346f948235b2c7b88c7d45a760b70c906427075d99381ab6c26f938230df0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87FE 5184 bytes
font_01_sfnt_off000099ab.bin
d8ff5efd305fa7f6e13f1a07997a34f5d341440783e1c4e3a5ae9797a5ba98bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99AB 10360 bytes

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