Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d84bf869a3d62e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-30 15:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d19c88d4312bda0bdcbf1294ffaa462d SHA-1: 20d9dc056e9268e9cbbfc0b8bd7f45385cf7c110 SHA-256: 19d84bf869a3d62ed4f90fe7158228c2ef8583193a060f2594c581180c7d1b62
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The primary malicious URL identified is 'https://ttraff.me/wix?keyword=honda+shadow+600+performance+parts'. The document body contains garbled text but also includes the same URL, suggesting it's the intended lure. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=honda+shadow+600+performance+parts
    • https://static.usrfiles.com/ugd/9c0842_42c3b5b03aac43b69f543841b65f2fa2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3837437e7d25421aab3b50b912a17539.pdf
    • https://static.usrfiles.com/ugd/7198c1_ed38b23a1c374ded95fd3d665976dba8.pdf
    • https://static.usrfiles.com/ugd/affaa6_613eee684c224dad80ab2a48521a5a5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_708fe6c2d1b544dd839c8f4c871f41a5.pdf
    • https://static.usrfiles.com/ugd/89363e_6451e39c4f80415599d775107e344a1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_57f22b90c1c349beb4dee70e8a6f115d.pdf
    • https://static.usrfiles.com/ugd/8b97dd_51f9034119254b72829da717474cf352.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/the_blind_side_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.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_off00005003.bin
78ada1fcb9dad3f89986118567274b75ca777c7ff80f610d3679c66ffa88f502		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5003 5712 bytes
font_01_sfnt_off00006350.bin
8fb2a0ced473dd28207ac5d0666dcddd60638442b388e615e566a175f4d375db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6350 10496 bytes

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