Malicious PDF — malware analysis report

Static analysis result for SHA-256 813dd6192d429a0f…

MALICIOUS

PDF

54.8 KB Created: 2020-08-16 23:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77dd0792c515d35b35b933e4e978e3fa SHA-1: 2c293c0e37b93a6d74d7d8e517c8384dd118bed2 SHA-256: 813dd6192d429a0f6c59c728d47db85742e7d9794577cfe39910a26007434d44
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to an 'incident report form'. The presence of many external PDF links, including a large number of generated SEO links, indicates a link farm strategy to distribute malicious content. 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.com/pify?keyword=incident+report+form+nz
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • http://gusomejit.johnbicycles.com/uploads/1/3/2/3/132303382/c24cec8a.pdf
    • http://files.jsmediadownunder.com/uploads/1/3/2/7/132740408/jolaponukudida_funom_likotemepigimog_defugakimum.pdf
    • http://gowifedoj.myispectrum.com/uploads/1/3/2/7/132740837/7983924.pdf
    • http://guvamig.princetonrescue-edu.com/uploads/1/3/1/4/131438003/c9bc1eb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/fofezebobadozo.pdf
    • https://cdn.shopify.com/s/files/1/0452/5893/2381/files/electronic_payment_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/58756352069.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/circuit_breaker_maintenance.pdf
    • https://cdn.shopify.com/s/files/1/0434/1733/8005/files/activex_control_in_vb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/24857350301.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8247/files/biwuvewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1633/9111/files/codigo_de_capacitores_ceramicos.pdf
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/76214349945.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/32582047423.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008326.bin
30a6dc94477adbe1d8d851e5fa14b0e46ec23ebaa32022a938d3d634a8ba2b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8326 4656 bytes
font_01_sfnt_off000092d1.bin
1e9489fe2dca88eb6fea547b0f31c956a37553b35f5ed0701ad00ab9582bad35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D1 14404 bytes
font_02_sfnt_off0000c00b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC00B 4324 bytes

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