Malicious PDF — malware analysis report

Static analysis result for SHA-256 e792a58ce9a7ec3f…

MALICIOUS

PDF

53.5 KB Created: 2020-08-21 15:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad7aac439b5d2741e1bbfe2d8031f77a SHA-1: ec9645882d9c4ac9ec3ec63110738429617e4b32 SHA-256: e792a58ce9a7ec3fc9bb49e29fe899d2ee08d3e489c6a438cf441f0ab8bb266b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'Gatineau park trails'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=gatineau+park+trails+pdf
    • http://files.smsband.org/uploads/1/3/1/0/131070011/c0197.pdf
    • http://junov.honeycreekpuppies.com/uploads/1/3/1/1/131163635/2563245.pdf
    • http://dikolu.babalini.com/uploads/1/3/1/6/131606000/pejimupa.pdf
    • http://files.sacredheartlibrary.com/uploads/1/3/0/8/130813645/zapavidugudafunag.pdf
    • https://cdn.shopify.com/s/files/1/0433/6975/8874/files/acta_constitutiva_de_una_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8336/6551/files/vaviwa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/81928048060.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2567/files/60162567590.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6686/files/canon_eos_5d_mark_iii_specification.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/damukuliguleminoropumoke.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/21456690924.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/73363739762.pdf
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/22812415026.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2994/files/chemistry_6th_edition_mcmurry.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/state_biot_savart_law.pdf
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/feh_hm_farming_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2153/1293/files/bacterial_genome_sequencing.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c4.bin
ca8bb065fa3a0e355dbbda0356d5dd6d7085bc40986d7e9d47907d7b8eff5913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C4 4904 bytes
font_01_sfnt_off00007872.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7872 1800 bytes
font_02_sfnt_off000080ff.bin
b22aeacacba32e962c6dfbe4e40863e5962beb0245c41fb14d50888f9de2770e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80FF 10412 bytes
font_03_sfnt_off0000a4d6.bin
560e11d5da3ed60647d844d0127c34f4fbbc0b68999cbe35161ddcd790341c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D6 16208 bytes
font_04_sfnt_off0000ba15.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA15 4324 bytes

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