Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6941b5688c20ad…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 13:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a7aec2aab28986b38819a11203b67fd SHA-1: f404340e50e82d552e7dcfe0c40c806e16545674 SHA-256: fc6941b5688c20adc96cf3923a1878071b28632bddac2463905493b22f65b94d
120 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a user manual for a TP-Link router. This link, 'https://ttraff.cc/wix?keyword=tp+link+archer+c7+user+manual', points to a known malicious redirector. The document also functions as a link farm, embedding numerous other links, many of which lead to PDFs hosted on static.usrfiles.com. The primary malicious intent appears to be directing users to potentially harmful external content through deceptive means.

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.cc/wix?keyword=tp+link+archer+c7+user+manual
    • https://static.usrfiles.com/ugd/b8c837_dac20c1629db4edea42acf905b7e44bf.pdf
    • https://static.usrfiles.com/ugd/857e61_e37091cd8dce4b55b04f07ed411c5505.pdf
    • https://static.usrfiles.com/ugd/26481d_ac3711a17700407791be5ef73530702e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1779f72805b5484d8595fa4a2d796370.pdf
    • https://static.usrfiles.com/ugd/b8c837_c600590d24314c688e96f21fb110b748.pdf
    • https://static.usrfiles.com/ugd/1be480_5b5d2baced584a7cbf71bb95ef57effb.pdf
    • https://static.usrfiles.com/ugd/b7082a_c8f10812e09d4a22a5d83894e2348c68.pdf
    • https://static.usrfiles.com/ugd/1d64af_87ecde1cc3f347d3ada1c68c34391a29.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/article_no_article_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/apa_manual_6th_edition_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/bamezufewavabilig.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/samum.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e9cb0a2e9c485fb7883d8ff08fdfe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_47e4f217def14a49a6bad2a3b6129161.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd3b8e362a2e4060896fd3ae632f73cd.pdf
    • https://static.usrfiles.com/ugd/5bb01c_06d496357a844c93891771b0936c5ebe.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_9c43f0d649fc4d96bfd8b93557f178d2.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_off00005f7a.bin
61fa556d0f4a23a6ceb4b6af4c19b734dfacc58fc7930d1e9a6f98bafb50edb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 5268 bytes
font_01_sfnt_off00007131.bin
fdd8cdf5560f054a6eb869f5e834e1ed89c5052ed3f150093e0748ddae5fe54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 11012 bytes

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