Malicious PDF — malware analysis report

Static analysis result for SHA-256 e893b8cd2fb8dc03…

MALICIOUS

PDF

45.5 KB Created: 2020-08-01 12:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 401c72a6958db36dd0ea52c29d8c41b6 SHA-1: 088c322c1387512c9aa32acc51c239de914249f8 SHA-256: e893b8cd2fb8dc0360c283cf0005d9d1a0a4427bce23ed160b647afe26b0acdf
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=jerry+baker+23+blast', is identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Jerry baker 23 blast' and the malicious URL, suggesting a lure to a malicious site. The presence of numerous PDF links indicates an attempt to manipulate search engine rankings or distribute malicious content widely.

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/pify?keyword=jerry+baker+23+blast
    • http://files.tfmusicparents.com/uploads/1/3/0/7/130739202/ca0ea1c4bc34.pdf
    • http://files.playandlearninstruction.com/uploads/1/3/0/9/130968992/105f6e8.pdf
    • http://files.bfacedbeauty.com/uploads/1/3/1/4/131437037/vavojo-dexekupuvozitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/jajixulebizufonotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/sekavoxoliw.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4872/files/530667714.pdf
    • https://cdn.shopify.com/s/files/1/0434/1245/5591/files/75749443800.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/bafuluvufileraziwomutifix.pdf
    • https://cdn.shopify.com/s/files/1/0432/8987/0491/files/wemunot.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/85791764552.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/ragowebubig.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0734/files/30627308497.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/74684149875.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/49018155948.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/vupuzanatimesenefagidaz.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_off000073c6.bin
879fe39b71ba856a592d7e982ec8dcb030cedc03fe4c702b4aa493f1cf4b7d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C6 5268 bytes
font_01_sfnt_off000085d3.bin
17c987f4a3a9fcd9540186cb36ce4bcf5151a3a92d6c9a12afa4393da17cf805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D3 10552 bytes

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