Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f74c089a52e531d…

MALICIOUS

PDF

39.5 KB Created: 2020-09-03 00:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61ba0e109f605aea4b63b3a61594c26e SHA-1: 61613d7a856dd67b7e630725c4ff7126c3d4a0ee SHA-256: 6f74c089a52e531d79f2bc82a342275e6968baaadaeead28016a24f06b475ee4
162 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The presence of a "download" button lure and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=flowchart+template+for+keynote
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6c98bc_0e4e3e4825b0450a85cafd6228f52a16.pdf
    • https://static.usrfiles.com/ugd/3fc21f_99a2e0a7dd034fe3ba583c4b84c23b32.pdf
    • https://static.usrfiles.com/ugd/5a1791_e4adbe542d0d4dcd886d521dc1e7b4ba.pdf
    • https://cdn.shopify.com/s/files/1/0431/5250/7036/files/40781524963.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/kejabuzibaguzibemel.pdf
    • https://static.usrfiles.com/ugd/64d889_92b43eb51bde45daaad36b472f016178.pdf
    • https://static.usrfiles.com/ugd/77d535_79815e130b0d4e2aab7387e19fdc8f77.pdf
    • https://static.usrfiles.com/ugd/50de67_aa366f05045f4be6b3624b4f5df73c27.pdf
    • https://static.usrfiles.com/ugd/868f76_60b2f2b5d63c4174bfff8816230dd25a.pdf
    • https://static.usrfiles.com/ugd/dd6616_000e7258377449969162377cbff352b1.pdf
    • https://static.usrfiles.com/ugd/c5d40f_d7e103b910f44d45aac38a4120b1822a.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_724de835f3724cac90b6d5c3fa1dd9b8.pdf
    • https://static.usrfiles.com/ugd/cafc24_9ae5565d092c4b3f8611bea7bc9477fd.pdf
    • https://static.usrfiles.com/ugd/6c032c_7a40e4a394b34295b4ac482b9b7005bd.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_off00005e32.bin
f8e623cae125ad7c2a7f58c283bce2846d3878299ebea10c29f955f2631be223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E32 5288 bytes
font_01_sfnt_off00007020.bin
f6b775907f04d01973ca3933a86545c4e4cd7363e2b393f6f4e78205f4e3ba72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7020 9708 bytes

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