Malicious PDF — malware analysis report

Static analysis result for SHA-256 526f3043162113fe…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 20:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 638f68b0550a66edef23d858a2674c3e SHA-1: 3dd5ff8114b74390a50bb4149ad81f98c67ccf94 SHA-256: 526f3043162113fefbdb3455941ed6cf4b8ae1595c132cd700d98cd7d416247e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links, 'https://ttraff.com/pify?keyword=bosquejos+de+sermones+expositivos+bautistas+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, contains references to sermon outlines and the wkhtmltopdf tool, suggesting a lure to entice users to click the malicious links.

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=bosquejos+de+sermones+expositivos+bautistas+pdf
    • http://files.isetteconi.com/uploads/1/3/0/8/130814529/1dc65b6e34ec39d.pdf
    • http://files.amorehairdesign.com/uploads/1/3/1/6/131607683/93480.pdf
    • http://files.rescuedessentials.ca/uploads/1/3/1/1/131163643/semit_jukamuwilogabos_tosavosuk_jasuge.pdf
    • http://files.yuffiebunny.com/uploads/1/3/1/4/131437724/8954621.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/24080765080.pdf
    • https://cdn.shopify.com/s/files/1/0430/9493/3665/files/46028760364.pdf
    • https://cdn.shopify.com/s/files/1/0439/9002/4350/files/44062810241.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/54742157917.pdf
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/mirabexobugakep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/duvitalut.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9666/files/sims_3_patch_1._69_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/medicine_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8801/files/12411072316.pdf
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/wusamewafozijuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/dozumupur.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/
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/54742157917

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000661b.bin
ebead6bcae740c1ac9106c76b3578af5ebe5e31d1b64221973d7b2e74af34c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 5676 bytes
font_01_sfnt_off00007959.bin
ba7676018037f44af9fc1545005f880f80cae20ab764c89e5a575f2d4d5081e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7959 11496 bytes

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