Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a045fdfa41f3d8…

MALICIOUS

PDF

41.5 KB Created: 2020-09-01 19:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8483fd773a40a112df2c3eb47fddc583 SHA-1: eac3709701486ada1fb1a3bd969a93452e36fbc9 SHA-256: b4a045fdfa41f3d8da3897bcb6b79d5352b730436a2a7b4ecc144ee3df406009
120 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 a link farm hosted on shopify.com. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious content. No scripts were extracted from this sample.

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=reporter+definition+synonyme
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/causal_mechanisms_in_the_social_sciences.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/fajibefijudelizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7599/files/roddy_ricch_feed_tha_streets_2_mp3_download.pdf
    • https://static.usrfiles.com/ugd/f1d680_0e73f9d6775842e7ac2b4255465e63c4.pdf
    • https://static.usrfiles.com/ugd/2f8cea_730753450e364970a3cf37cffe07df2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b096c093df247f990f3b43c424a6382.pdf
    • https://static.usrfiles.com/ugd/63022f_ea19603dd1a04be4b596ed68c13ace74.pdf
    • https://static.usrfiles.com/ugd/2c8d66_348acb5fbb8d4ad3ba146c2ff38e9e34.pdf
    • https://static.usrfiles.com/ugd/6240f8_67c549447341444eb4e89c7156706722.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dd76032c2fb4879846c6c50cf3f39df.pdf
    • https://static.usrfiles.com/ugd/cdfdba_30cf698de48844fa9ed5ea889d601cc2.pdf
    • https://static.usrfiles.com/ugd/d54300_02b03a28cd9d4448b2da9f985d810508.pdf
    • https://static.usrfiles.com/ugd/868401_928d05589b374932a021bdab180081ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0475a3801464942af14b71f50fe77e2.pdf
    • https://static.usrfiles.com/ugd/efb3f0_69366428518943b0b3c0c3b9b7b90101.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_off00006161.bin
c4992f91fad4e79dc8a4f8e31f4187b4b661db6119f8ce1732f0f156395b6176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 5052 bytes
font_01_sfnt_off00007292.bin
373f90e3116ae616ce3feecba88dccb42cafbfa3e6022a4366e23dedad07db60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7292 11340 bytes

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