Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b5a774de46b997…

MALICIOUS

PDF

41.7 KB Created: 2020-08-06 13:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 682d292a10a610e2e006464f379d2bce SHA-1: b4af8e01ed9dd1ed75a21a48016fe336e88eaf0f SHA-256: 65b5a774de46b9978fe162a9d313ace9ca3d4f23e152132ceec84babe77126f6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=orthographic+drawing+exercises+with+answers+pdf
    • http://files.chadgmalcolm.com/uploads/1/3/1/4/131454345/sotusedagogive_difesu_goriditaritogov_dujax.pdf
    • http://files.sinclairseniorliving.com/uploads/1/3/2/6/132682758/kadoxumowin.pdf
    • http://nesafib.leeannhorrillcounselling.com/uploads/1/3/2/7/132712207/pujaluworomupe.pdf
    • http://files.francheskafifield.com/uploads/1/3/1/4/131483234/2344049a47.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/38577057314.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/tipos_de_perfiles_de_aluminio_para_puertas_y_ventanas.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/convert_to_word_document_that_can_be_edited.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/54556023573.pdf
    • https://cdn.shopify.com/s/files/1/0434/3064/1829/files/ralofujidorej.pdf
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/muridamuwafupanojatazo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/mupekolezefaxoxovaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/87012990372.pdf
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/95914016320.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/degelewupogusajuxuteg.pdf
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/mudanojojagevesajijes.pdf
    • https://cdn.shopify.com/s/files/1/0445/4249/2836/files/autocad_file_to_online_converter.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_off00006248.bin
66f410e70560c546240203992d43a7b24568c00189ae597f44b20fd5300a4a7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6248 5572 bytes
font_01_sfnt_off0000754c.bin
461e28cdb23de20fafb8f40d161cab9c47a1b18b91b49fdb091199a11e07596d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754C 10780 bytes

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