Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52973dbea90bd48…

MALICIOUS

PDF

38.8 KB Created: 2020-08-31 04:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03fcb1375869a92fea7e936aaa88bc69 SHA-1: 59720410950dc19885286ad4166f87db5904241c SHA-256: b52973dbea90bd48ea1d0e1ddb7278b55987918a6244b0e4188458449c655c7e
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to ttraff.cc, which is known for distributing malware. The document also contains a mass external PDF link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious payloads. The presence of a 'download button' lure further supports the malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=samsung+j727a+root+file+download+sit
    • https://static.usrfiles.com/ugd/96768c_54401e8c7ba544879e6acfedfc58c74a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd0bdb4ea354122ab036d196f5a9c5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_03186abb292c4270861edeec6251bea5.pdf
    • https://static.usrfiles.com/ugd/afe78f_c945f2e71d2b4341930b1c505342afaf.pdf
    • https://static.usrfiles.com/ugd/b5472a_88399cdb5ae14b5f9652ef7e888b824b.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/free_action_photoshop_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/1144/8727/files/ms_office_for_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/paypal_recurring_payments_developer_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/duketimisotomotajamadelo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/68385211420.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/46579917911.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_off000058be.bin
a2dffa79b8e2ad15235ae5ad91505495d87485b14d6b216db98fd24e0abd447c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58BE 5712 bytes
font_01_sfnt_off00006c37.bin
86d5d80529bf4490c42de75e3801864d9ae5de612c26d284d9cabc17002fdd88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 10096 bytes

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