Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc376d63f1178067…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 03:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05c5d69643a83c6beea6334f89918db9 SHA-1: f8bece9410667adb7309aafd9f53d5839c7b0332 SHA-256: dc376d63f1178067a5ad89fa78a1a0e586575c1a5b00d22644960dc1f55798c4
128 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, many of which point to Shopify domains hosting PDF files, suggesting an attempt to create a link farm for SEO manipulation. Crucially, one of the links, 'https://ttraff.cc/wix?keyword=tallinn+manual+2.0+pdf+download', is identified as a known malicious redirector. This indicates a probable attempt to lure users to malicious content or phishing sites.

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=tallinn+manual+2.0+pdf+download
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/unlimited_power_tony_robbins_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/college_algebra_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9826/0124/files/31738556672.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/95368714028.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/78555884643.pdf
    • https://static.usrfiles.com/ugd/b85eb0_09eea5580e88476d96f4683231c9b12d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d49e5c5caf9482085299ed73482cb7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5c6e364a7c6432a8407218a8b7165ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc4d593d89d3458f8c6ce36337143781.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73295986d444f3382ac896738b636b8.pdf
    • https://static.usrfiles.com/ugd/625844_51af9ee195d549599fb3b43df4fa260b.pdf
    • https://static.usrfiles.com/ugd/1849a1_52a4c53a63e64931b94bc10367a4f8ab.pdf
    • https://static.usrfiles.com/ugd/930050_7d365a521d5c425d8be148b40005fe51.pdf
    • https://static.usrfiles.com/ugd/5926b4_b3c61a9b246b4fdcbd8b4198bca6cea0.pdf
    • https://static.usrfiles.com/ugd/696b8a_88b5c9994b2149b4b6f54dce612cf673.pdf
    • https://static.usrfiles.com/ugd/b8c837_e77ac6e23bbe420dbf74ac012ce76e96.pdf
    • https://static.usrfiles.com/ugd/b8c837_25db1d548a5849b9814507fd727b93b6.pdf
    • https://static.usrfiles.com/ugd/97368a_0ba0fe932f9a46b5865bf10ba4dcef69.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_off00005e58.bin
f80c795373cc06c02fa244c3d728052841a67a371849e6516ad733afaf7c88eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E58 5260 bytes
font_01_sfnt_off00007041.bin
64b1bbd37110f7a9e39bbe1576c8d0feff582f51a35d479f72b5e546ac296596
pdf-font-stream PDF embedded font (sfnt) at offset 0x7041 10428 bytes