Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da49cca4f643adc…

MALICIOUS

PDF

54.4 KB Created: 2020-08-21 22:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a58edea286fda998d26e5e69dd210c9 SHA-1: a1845cfd782af228981b8570de547e91e4d3f88c SHA-256: 1da49cca4f643adcebb36f8a24f5389380c3a50e0a9fd422bb9341e43bb7cd67
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: 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. This indicates the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector.

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.com/pify?keyword=unicorn+head+coloring+sheet
    • http://files.palmcoastflautorepair.com/uploads/1/3/1/8/131871390/3f139.pdf
    • http://mupuvoja.niktstudio.com/uploads/1/3/1/0/131070718/3d74cfa0a6c850.pdf
    • http://pufusug.westbroncoband.com/uploads/1/3/1/4/131408984/rodavolodapumubola.pdf
    • http://files.ag-cat.com/uploads/1/3/0/8/130814078/4145932.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/tumores_de_anexos_cutaneos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/89894325411.pdf
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/39065311820.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/togodujoluk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/appareillage_de_commande_electrique.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4317/files/79229695045.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9892/files/windows_10_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/81158149958.pdf
    • https://cdn.shopify.com/s/files/1/0440/0729/3086/files/79074720436.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9379/files/72181128491.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/zijulalobowuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/99685236522.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/nusuduke.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/popojadedisekuwosi.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_off00007c33.bin
5b722ad9112f3cdb427635e1462c602ba5cd89083f7dfa71e441adcb61051410
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C33 5192 bytes
font_01_sfnt_off00008dc5.bin
e087d5b3f22c84aba36b47cc2fafdcde719207c7bafe88ce634a82f5d60b4f41
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC5 12896 bytes
font_02_sfnt_off0000b751.bin
2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB751 16120 bytes