Malicious PDF — malware analysis report

Static analysis result for SHA-256 51eab68fa946f219…

MALICIOUS

PDF

37.3 KB Created: 2020-08-27 17:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0a451aacc150f632f0e78390fcc325b SHA-1: 28edec96ba3599c4be315e2fea47d92ced9a41a5 SHA-256: 51eab68fa946f21989357b5ecdc8306931bb485a7cf1efc4c3642c23273f570f
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The document body, though heavily obfuscated, contains the same suspicious URL found in the heuristics. This suggests the document is designed to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=dvd+effortless+english+full++free
    • http://files.defensivesolutionsmidland.com/uploads/1/3/1/1/131164431/1698018.pdf
    • http://files.bigskyattorneys.com/uploads/1/3/0/7/130775115/506896.pdf
    • http://files.travelinkaren.com/uploads/1/3/1/4/131406840/74229706e320a27.pdf
    • http://files.ohioadolescenthealth.org/uploads/1/3/2/7/132740905/856f4f516e034ea.pdf
    • http://tapep.siglapscec.com/uploads/1/3/1/6/131607712/bapogivelolupujujal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6722/7811/files/50283739364.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/sozovolirozagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6908/files/40047649220.pdf
    • https://cdn.shopify.com/s/files/1/0431/2560/4513/files/rule_1_phil_town.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/26789722552.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/38571603030.pdf
    • https://cdn.shopify.com/s/files/1/0447/9546/1783/files/maharashtra_assembly_elections_2020_results.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/can_t_hurt_me_download.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_off000055ff.bin
023e9a69ed4ea1c3d335a216bcdae53c640f64eb9575ba20a61026ce7e25c7d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55FF 5020 bytes
font_01_sfnt_off00006716.bin
c6bf00fdb7ece3e1bff3d1e4951eb4d1af6639130723641329438cd8286089de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6716 9804 bytes

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