Malicious PDF — malware analysis report

Static analysis result for SHA-256 e807cca0992cd829…

MALICIOUS

PDF

68.8 KB Created: 2020-08-29 17:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7948798aa890be540b58201748da4d7 SHA-1: 135c2b8cd3a16bab98c89817668c5ee331252c9e SHA-256: e807cca0992cd82962d77d1391de62068e31c9d4629d9f2b75bec356b35e84ad
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as 'downdraft solar dehydrator plans', indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but serve to obscure the malicious one. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=downdraft+solar+dehydrator+plans
    • https://static.usrfiles.com/ugd/b8c837_ab76910009f1403cb19aff60a750fa02.pdf
    • https://static.usrfiles.com/ugd/bf650e_61e5adad98a04e3fba940f70b6ae0775.pdf
    • https://static.usrfiles.com/ugd/0a593f_65e1c46fa5fa4464b7a1b002f4a42715.pdf
    • https://static.usrfiles.com/ugd/b8c837_71ee7a45dfad423e9b5932f2d52fef28.pdf
    • https://static.usrfiles.com/ugd/b8c837_e53aff4846cd4ff38480f7f89c86b1dd.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/banking_exam_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/2358/9791/files/guillotine_shear_hydraulic_metal_sheet_cutting_machine.pdf
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/3214682834.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9287/files/57723939913.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f1b9f5a88e84d1e847c33a712fe93b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a670356499dd43e3894f7909b301ef2a.pdf
    • https://static.usrfiles.com/ugd/a86d68_a54d6f6dd6a64385b661ef9e9c24466f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1a627c5ce0b43ecb4bf5698ded0d5e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_53686dd539794b55860797b7d42ce3b6.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_off0000cf70.bin
39a363fdf89ae23e936779c40249e9edc89cb4088200540440eacb747992f55c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF70 5324 bytes
font_01_sfnt_off0000e1a1.bin
7cdb7bb4a265ffd9925d5034d97de0b700ee0b5c7aa232571a20cac8d52a6c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 10636 bytes

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