Malicious PDF — malware analysis report

Static analysis result for SHA-256 697163930f8fdfbf…

MALICIOUS

PDF

41.7 KB Created: 2020-08-28 21:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7921f28d48e84dc529a9e574a8b5b0a2 SHA-1: c8903324660de4214f29c22db5782380b34345ce SHA-256: 697163930f8fdfbfc7ab566d233ca3ae18ab2cb7b638b9d30d52493f46c9c7f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a search query for technical assistance, which redirects to a known malicious domain. The document also contains a large number of links to various PDF files, likely for SEO manipulation or to obscure the malicious redirector. No scripts were extracted, but the presence of a malicious redirector and the lure suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=how+to+factory+reset+windows+7+toshiba+satellite+c655
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6454/1852/files/pdf_to_xml_online_free_converter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/noter.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ac059802fc34f08872ac0a45fc587c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b8570033c1c410996df5bb174229800.pdf
    • https://static.usrfiles.com/ugd/b8c837_85e335e89242484e805564d06a3c0338.pdf
    • https://static.usrfiles.com/ugd/b8c837_b88d3958e0544203acd54e37eeedbea4.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f98010e7f1a449c86d15ffb029b3a66.pdf
    • https://static.usrfiles.com/ugd/b8c837_200f364c922e45bb91bc11556e7d4c61.pdf
    • https://static.usrfiles.com/ugd/b8c837_d3b3e9e6523146d191ab8bd65508d732.pdf
    • https://static.usrfiles.com/ugd/b8c837_0887dcaaabfa42f485b4679c9130eee4.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0618a34573440f1a81cb9f089fdd66b.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/80258263857.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/31547915721.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/sagado.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/towavap.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/44143233945.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006386.bin
fcfc2b2ebd3ef5a5de7dd9341d3e7bbefca0944b2a44ce382a53cf8923797fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 5764 bytes
font_01_sfnt_off0000773f.bin
ff2e59cc2de1d3bdc107a59b60b97d470222f8dfca157a2ab0de51094df39e95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773F 10044 bytes

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