Malicious PDF — malware analysis report

Static analysis result for SHA-256 254d5d4392f0a368…

MALICIOUS

PDF

37.7 KB Created: 2020-08-29 22:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8acafcfba52cdaa9b956c4c11e608e9 SHA-1: f8098670219d939006bbc76bdc94cf4a384bd034 SHA-256: 254d5d4392f0a368c4413c03c2246368de141eedb0e595c87bba7ee1314ebe3e
150 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, with a critical heuristic firing indicating a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=divinity+2+body+parts', is flagged as a known malicious redirector. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious redirector URL and the link farm structure strongly suggests a malicious intent, likely to lure users to malicious content or phishing sites.

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=divinity+2+body+parts
    • https://static.usrfiles.com/ugd/b8c837_588dbc5bd472479db7ae59b392ec3bdd.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bc6a584438644838b5e22bc81baf359.pdf
    • https://static.usrfiles.com/ugd/b8c837_d13b8eb516ba46ffb85a772e51f20f37.pdf
    • https://static.usrfiles.com/ugd/b8c837_f166e2c1d215496f9fdefdc1a5be1c93.pdf
    • https://static.usrfiles.com/ugd/38bf1f_0926712b103140758a88a4d67bb28f9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9606e8de32fc4678b6a6a434a3988853.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/aiims_ka_full_form_kya_hota_hai.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/didini.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/44124270047.pdf
    • https://static.usrfiles.com/ugd/b85eb0_066af7a4655d4a7bbb87d70869238034.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_a0f53ab1a1e343ea8323c570e0ab3fe5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8851dfdb54e04661ba2ea098443a24b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ea06ee8763242819b6ad57a77c297b8.pdf
    • https://static.usrfiles.com/ugd/99afdc_e48024ddb4a341b4a84e11350493a6e0.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_off0000565d.bin
961f8758e3188b9136318229b02d4634e07e29e2b381628dfcb0e38c593d0c90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x565D 5352 bytes
font_01_sfnt_off000068a1.bin
ed6d99f8530d4aeeae93fe581ff2fdaf8aa57552d623f4c204f92a78ef88edeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 9916 bytes

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