Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ca56f1145ab025…

MALICIOUS

PDF

52.2 KB Created: 2020-08-22 05:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 568e27c5cc335a091eb5786d938d6bd0 SHA-1: 6878aca6922ffb233c285778b8e63815c8098b69 SHA-256: 98ca56f1145ab0250489ed585efc1bfe7ecf55b22a264411b30dfc01bcae65c2
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, identified as a link farm, pointing to various external resources. One of these links, https://ttraff.ru/pify?keyword=arslan+senki+s3+sub+indo+batch, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to potentially harmful content through a chain of redirects.

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.ru/pify?keyword=arslan+senki+s3+sub+indo+batch
    • http://tojinuto.anasaem.com/uploads/1/3/1/3/131398294/1413558.pdf
    • http://files.leadershipcentersw.org/uploads/1/3/2/6/132681783/26e5ba1e83c570.pdf
    • http://gupiwa.andersonwindowsanddoors.net/uploads/1/3/1/8/131872295/2414017.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/46972488611.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/8980177671.pdf
    • https://cdn.shopify.com/s/files/1/0434/1137/4234/files/zunofetiruzivejiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/98644194901.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/nanoketu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/84383944451.pdf
    • https://cdn.shopify.com/s/files/1/0439/0882/5256/files/pabozodudela.pdf
    • https://cdn.shopify.com/s/files/1/0438/2448/0416/files/84992011193.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/cinquain_poem_worksheets_4th_grade.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ed5.bin
9d08857a5e8ee4ce48d3747c8beb7b5b328ba5ee65bd7976afc2d70b9383b1c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 3176 bytes
font_01_sfnt_off00006a36.bin
cd4d97afa818d6845462d55414840ae5dabbd77d68a157eb45aee5938d1222ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 5264 bytes
font_02_sfnt_off00007bff.bin
a343a2bc77cad5564cabd325e1e4a2d88ec860317a28f7fc2f56eeb8c0e60fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFF 10112 bytes
font_03_sfnt_off00009edb.bin
f057e33b618d4a9aa5fd3d23832d996b3b77724f2804022b5b873a507ef56d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDB 16520 bytes
font_04_sfnt_off0000b534.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB534 4324 bytes

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