Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadf488230ee8135…

MALICIOUS

PDF

39.7 KB Created: 2020-08-29 02:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab324958f4a46111a3256f539626dc44 SHA-1: bd05513a13686901e2b60acfb8e9f8e8b0087929 SHA-256: dadf488230ee8135826fc55ed09902f7e97db904aa3c11dd7b08aac8eba803a9
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.com/wix?keyword=art+of+astonishment, which is likely used for redirection. The document body contains garbled text but also includes the same malicious URL and numerous links to other PDFs hosted on static.usrfiles.com, suggesting a coordinated effort to distribute content or traffic. No scripts were extracted, but the PDF structure and link farm indicate a social engineering or SEO poisoning attack pattern.

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=art+of+astonishment
    • https://static.usrfiles.com/ugd/b8c837_59ff829f94c3483a8c4b6a6e784a5410.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b4fe78759e04684aabf1f8158644440.pdf
    • https://static.usrfiles.com/ugd/b8c837_19b538f52b314fc4ac84d734c69df4f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6ade1eebc8242aba3474f90d177a413.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b08baf284bd45c2bbd8604b98a96420.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0d0e11fb6cf43d29792f026b4d63c22.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51a4045a515473d84f23bf42b5d6aa6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed4f432c9377471093478c72c3905090.pdf
    • https://static.usrfiles.com/ugd/b8c837_93b387b90d8041d1806cdeb586303db4.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0557/files/employment_reference_letter_for_rental_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/9429/4171/files/jupubekokegiwawareket.pdf
    • https://cdn.shopify.com/s/files/1/0463/1815/7989/files/candy_crush_jelly_saga_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/51701873123.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_off00005ed4.bin
dee3bc62fcfec3a9fcb0e0e139826600cab3eaa08eaf29ef8f2a7d6b669fd500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 4964 bytes
font_01_sfnt_off00006f85.bin
0076ac67de702c4d14999a9f85113759c4c9b41270b6ef5eabe4eed61db5f055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F85 10184 bytes

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