Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a40adab3ae59a9…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 07:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7792638d34d2ef6470e165de7a336dde SHA-1: 79d4f5e5422d7530d6dc511d4c88c3ce38a7249e SHA-256: b9a40adab3ae59a9256bd5d48efe4d4f2f19af38bd6557fafc542e79dc747eb4
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 primary link pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Revelian cognitive test answers' and the malicious URL, suggesting a social engineering lure. The heuristic firings confirm the presence of a malicious redirector link and a link farm, indicating an attempt to drive traffic to potentially harmful sites.

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/wix?keyword=revelian+cognitive+test+answers
    • https://static.usrfiles.com/ugd/b8c837_a3912266a6694ec7a4038ccb1f1778ca.pdf
    • https://static.usrfiles.com/ugd/834936_d5152e9cc8b8470181d0948943823246.pdf
    • https://static.usrfiles.com/ugd/b8c837_7edd44ac085d4c6fa20bd1fb0a4a616f.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/novebuvoxijakosub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/juwisewukikeniwivob.pdf
    • https://static.usrfiles.com/ugd/b8c837_1229d99cadd74615a225a1d4375d81ec.pdf
    • https://static.usrfiles.com/ugd/1c8c6c_7e362398d8554ed29acd90dedf4a0cd6.pdf
    • https://static.usrfiles.com/ugd/ec0c41_b47420c2fffc4d57a99aacb876763cce.pdf
    • https://static.usrfiles.com/ugd/b8c837_11f23be4674c416ebfa7e960a66256f8.pdf
    • https://static.usrfiles.com/ugd/8ab72e_b449494e3fd549a48ebb2601010ce256.pdf
    • https://cdn.shopify.com/s/files/1/0430/6577/0135/files/trigonometric_identities_worksheet_introduction_to_identities_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/welabiwaf.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_off00006868.bin
00b46d48a964594d0126541c3da76da476f7c533046adea81803fd7b2c32ed40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 5128 bytes
font_01_sfnt_off00007a03.bin
25b5c99f5ecbdf0e082f74100c8d0d3c26ae3fa4ebe99748aaab9861c657865f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A03 10468 bytes

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