Malicious PDF — malware analysis report

Static analysis result for SHA-256 04680ca47fb12194…

MALICIOUS

PDF

52.2 KB Created: 2020-09-01 14:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db3c98b913a053303fa583fa82c6f77f SHA-1: 3e2eb4e011c5db97fb9e267949d3ddc966dbcfb8 SHA-256: 04680ca47fb121941eda1c020b07943f7941316b9e3046f687b67c2fee51e017
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to a known malicious redirector, and impersonates a document signing service to trick users. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the presence of embedded links and the lure suggest an attempt to redirect the user to malicious infrastructure, likely for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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.me/wix?keyword=goodreader+voor+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/270e53_91e999185d33411691ef6945bb1a94f1.pdf
    • https://static.usrfiles.com/ugd/4b68be_f13413c1f7974794a753ec8b051f37da.pdf
    • https://static.usrfiles.com/ugd/bf07b1_59b08604bd8f47ef89ab5f3f600b1800.pdf
    • https://static.usrfiles.com/ugd/3aee12_66720f02a6b848dd8c9cb092eb772052.pdf
    • https://static.usrfiles.com/ugd/b8c837_61bd09aa55164e8187b767f01e3b8b5b.pdf
    • https://static.usrfiles.com/ugd/9a242c_cff8d97c43ce4cf8abef097fada783b9.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/zotixux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ginowojero.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079f9.bin
fa0128a45086381994b2c1156bdbec79ac2d9b5791e45b63d584f84d181e0815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 4700 bytes
font_01_sfnt_off00008a08.bin
7b7973ed4e82a3f3eb9cc8d202d2212ba986458416c1b7a11e6bdbf6d3938e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A08 10896 bytes
font_02_sfnt_off0000af7a.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7A 16092 bytes

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