Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4229d1f6bacda2…

MALICIOUS

PDF

50.6 KB Created: 2020-08-30 09:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c7dd0a9c593701075f9a48c8267af5c SHA-1: b0fc32be580744d9627e52af5cedf7636ea1e097 SHA-256: fe4229d1f6bacda2fc83842aa910967f361d44ec7077d6fe31efcc16b5ec2091
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, identified as a link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and what appear to be links to PDF files hosted on Shopify. This suggests a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=taurus+247+oss
    • https://cdn.shopify.com/s/files/1/0431/6240/2965/files/bvcam_app_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/ninidikajeteregaxeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3144/files/43872579750.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/vlc_video_player_free_for_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/kudeto.pdf
    • https://static.usrfiles.com/ugd/0a0016_6dc675d9c6c2428eae4578db200c9ea6.pdf
    • https://static.usrfiles.com/ugd/b8c837_47b202d7a54d49bcb8fff20e4828ace3.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_a3fbe2b890bd4840be5dcd7a25bf070f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d042635540de4ebbb0ddd2c913928607.pdf
    • https://static.usrfiles.com/ugd/b8c837_48dfbe299e9a4f2b8cf9536bfa38540c.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0530/files/lemimesaguwuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/acids_and_bases_pogil_answers.pdf
    • https://cdn.shopify.com/s/files/1/0463/0426/4354/files/mutunugutivedivo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/jawovulemole.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/philippine_medical_technology_laws_and_bioethics.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b17.bin
fc28ef67ef8ebe036359cb2268e7f3e002bc7e17dc2b5d0392dead9197974745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B17 4424 bytes
font_01_sfnt_off00008a29.bin
bf5f9789d21529576f05b60e319ce30d764662a4e0d030388b9743efd47ecea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A29 10948 bytes
font_02_sfnt_off0000af7b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7B 4324 bytes

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