Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3c9eb3a8389518…

MALICIOUS

PDF

55.8 KB Created: 2020-08-09 03:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41bbe64679fa3897aa429d3ec0316ba3 SHA-1: 924be048398f62a624f04e32190c2277e4e61921 SHA-256: 3d3c9eb3a83895181e69cf0092635467b28f16911f0d216bb3de1f75f17bdc45
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Treatment of depression pdf' and includes the same malicious URL. The file also exhibits characteristics of a PDF SEO link farm, with numerous links to other PDFs hosted on Shopify, likely to obscure the malicious redirector. The primary intent appears to be directing users to malicious infrastructure under the guise of providing information.

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=treatment+of+depression+pdf
    • http://files.iwfgeorgia.org/uploads/1/3/1/4/131455883/dofez.pdf
    • http://vejatisir.egfhc.com/uploads/1/3/2/3/132303382/7971862.pdf
    • http://files.nourishecovillage.com/uploads/1/3/1/4/131453121/dewuxenew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50971407729.pdf
    • https://cdn.shopify.com/s/files/1/0431/2121/3591/files/47611409689.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/vemonoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/sifivenawiwabasezoso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nazowexoratusitufunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6618/files/9204549203.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/analytical_methods_for_biology.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/free_minecraft_account_and_password.pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8044/files/39568839009.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9953/files/propiedades_de_la_planta_moringa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009076.bin
940f3f8ddcafe34e802801bf93f56e18d9b39118e6f924e27117d7208c1f71b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9076 4892 bytes
font_01_sfnt_off0000a0f4.bin
20366f7e9b86a0895459d7699a80794eaf93a4768373bb97b3d5d48e50438e3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F4 10516 bytes
font_02_sfnt_off0000c493.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC493 4324 bytes

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