Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f7c0684f058870…

MALICIOUS

PDF

110.4 KB Created: 2020-09-08 08:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f524a27b3c5c21e880b4af7aabd64eac SHA-1: 55d776cabf346d6206fc87febd79c6ecf2910b5c SHA-256: 80f7c0684f05887072777cdaed580dce578b6636f14e3517775a43302ed37614
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.link/pify?keyword=sap+bpc+10.+0+installation+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, indicating an attempt to trick users into clicking it under the guise of a software installation guide. The ML classifier strongly flagged this PDF as malicious.

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.link/pify?keyword=sap+bpc+10.+0+installation+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b4a829_02be0d8d806d4e319796f6e5de5579f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e31703808bf4874b7dd69aadd26b9a4.pdf
    • https://static.usrfiles.com/ugd/de02f3_ec3d02bc61b9442d9a929397690286b5.pdf
    • https://static.usrfiles.com/ugd/2f07a1_fc58ffdacd4b4875a63db097fd418499.pdf
    • https://static.usrfiles.com/ugd/0789d5_641b58844cea4157990658870fe06039.pdf
    • https://static.usrfiles.com/ugd/ce77c6_cb2aae91855847c3b30bca6b983106dc.pdf
    • https://static.usrfiles.com/ugd/47e66e_86c62a6006ae4a53ba3631a19ca2df0c.pdf
    • https://static.usrfiles.com/ugd/1decf9_0f600a63e80e4c1cab05b23bdeb39d27.pdf
    • https://static.usrfiles.com/ugd/685707_01043fa3b391424c8b05d01bb6fb1829.pdf
    • https://static.usrfiles.com/ugd/0bfb20_da91c36bd2e84c588e2bc90895b1e327.pdf
    • https://static.usrfiles.com/ugd/3bcfef_bc43aecb0f63426d8083a8c59247a4e5.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/sopefudozig.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/58219690640.pdf
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/48794299494.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4487/files/adobe_acrobat_7_updates.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/zujajogudenexupenipuzov.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_off00016b74.bin
0d2cbf4e28c586581126f0c308f75bf7ddc4c442b18afe3fcf2928d6261c6632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B74 5612 bytes
font_01_sfnt_off00017e97.bin
3fc1f5fc80e55dc1c4c995228a2a0d9d93b0b9578371b7a4934153d5c6784924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E97 14612 bytes

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