Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0e49749f0f823f…

MALICIOUS

PDF

45.8 KB Created: 2020-07-19 03:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bfbe09661385a6c8e226412f0e88870 SHA-1: 48631f709d956f98fdb8da1f52c2ce8874616fda SHA-256: cb0e49749f0f823f67bed996635e1cfa40b55215cde04b7cad815b031fc79bbd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Bmw motorrad accessories pdf'. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be a phishing lure directing users to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/wb?keyword=bmw%20motorrad%20accessories%20pdf
    • http://files.newyorkstategrandcouncil.com/uploads/1/3/1/4/131437538/bapemo.pdf
    • http://files.rhythmsofawoman.com/uploads/1/3/1/1/131164372/vuwexin.pdf
    • http://files.secondtonunframery.org/uploads/1/3/2/6/132681482/5800604.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/51814052761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0966/2366/files/kixuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/nupejadipopi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/wolatuzotekakuze.pdf
    • https://cdn.shopify.com/s/files/1/0435/8347/1771/files/9137495876.pdf
    • https://doluwamesiwe.files.wordpress.com/2020/06/kukubakuwujexevazu.pdf
    • https://daborexawuv.files.wordpress.com/2020/07/dikakujubemolo.pdf
    • https://zuvarore.files.wordpress.com/2020/07/65961948750.pdf
    • https://katewudexigo.files.wordpress.com/2020/07/89796851347.pdf
    • https://pugazizigo.files.wordpress.com/2020/07/35836246956.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/28055397166.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/jizuwopakakir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82973104521.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/febewexovukaserolaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/xanokekomem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7539/4977/files/58742315670.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46506788711.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e7.bin
068eca9537f64ec8a588549cda730aca0c1bb57321bd890a38773a622a6b4d41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E7 6684 bytes
font_01_sfnt_off000076ef.bin
634bc3c7dda5da0cbf4e8cd132ebe60a6252e4889d2fdddbdf80cd5575a5a2ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 5092 bytes
font_02_sfnt_off0000884e.bin
d3527b5f6bc3daca51c47dcc00b4ad9c03218b005cc001a5a62e03cf694150b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 9696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.