Malicious PDF — malware analysis report

Static analysis result for SHA-256 458bd0b0145143dd…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 02:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a1dd1c26c2327bb562eb12ed7e06dfd SHA-1: b846cfc3c101fe1739dc969978a1640cfcba2007 SHA-256: 458bd0b0145143ddb349d2c6097be7fe09c67fe7b31a01f32130a1e19c149224
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or phishing. One of the embedded URLs, https://ttraff.ru/wix?keyword=mobi+to+epub+online, is flagged as a known malicious redirector. The document body is heavily obfuscated and appears to contain junk data, but the presence of the malicious URL and the link farm structure strongly indicate a malicious intent to redirect users to harmful 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.ru/wix?keyword=mobi+to+epub+online
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/24439480597.pdf
    • https://cdn.shopify.com/s/files/1/0438/0724/4450/files/tumidolov.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/real_estate_cms_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/561835827.pdf
    • https://static.usrfiles.com/ugd/7198c1_ed38b23a1c374ded95fd3d665976dba8.pdf
    • https://static.usrfiles.com/ugd/b8c837_11aa4c9333a142c0af0c7741f0e27970.pdf
    • https://static.usrfiles.com/ugd/493135_a788fe4e53d24a4a92c7dcbb2e35917b.pdf
    • https://static.usrfiles.com/ugd/5360f8_a9a1e27b718547f9bcd3c56ec2c4f7d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4828b92555b41358da5203a94787f42.pdf
    • https://static.usrfiles.com/ugd/b8c837_c468c2040188450289c3949a2aa6740d.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/vufananurunowiwelogedili.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/dijevibulopugamugolumur.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_off00005db0.bin
22a16acdc2230f0ff26b452c951bfca1036ad06e620a3390ac8a71a8f74a83d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB0 4472 bytes
font_01_sfnt_off00006cf5.bin
6c1ac6a6598990e9bab289d7cd9050e331f877e11b5dde391986068eb2823093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF5 10528 bytes

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