Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b615916e73dfb06…

MALICIOUS

PDF

53.4 KB Created: 2020-08-19 00:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74d32b315d76da8aff7f83023417bd20 SHA-1: 7ad82a48487586b7d6cac7bd939edd61ca672a08 SHA-256: 4b615916e73dfb067ccc14830c971bf73879d8b522a4cfcf97388eb69af1b845
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on various domains, including a large number on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=form+of+aspergillus+infection'. The presence of numerous external links, combined with the malicious redirector, suggests a link farm or SEO manipulation tactic, potentially leading users to malicious sites or further payloads.

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=form+of+aspergillus+infection
    • http://siduzole.crochetsweetcrochet.com/uploads/1/3/0/9/130969586/fb7fa5147d51380.pdf
    • http://foraja.nineravensstudio.com/uploads/1/3/1/4/131454106/2f162cf80483e.pdf
    • http://fipinab.darbycreekpto.com/uploads/1/3/1/4/131437657/9408067.pdf
    • http://pebix.joscadenise.com/uploads/1/3/0/8/130814297/zipixijuxar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/mapa_turistico_aveiro.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62374455636.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/vewiwewaxotinufoda.pdf
    • https://cdn.shopify.com/s/files/1/0438/5023/6064/files/30163719724.pdf
    • https://cdn.shopify.com/s/files/1/0431/1187/4716/files/atkins_quimica_fisica.pdf
    • https://cdn.shopify.com/s/files/1/0431/8075/3058/files/76737123003.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/simple_present_tense_adverbs_of_frequency_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/50134762270.pdf
    • https://cdn.shopify.com/s/files/1/0431/9694/0448/files/algebra_word_problems_worksheets_year_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/ski_doo_mxz_trail_schematics.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_off00007c52.bin
9d7ff0ab7711c2b93d49ce939b295f8076c2d44ff9a83ba867521c2fa9b2ec9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C52 5288 bytes
font_01_sfnt_off00008e3f.bin
12e0e2d55e1af1812a99c07cd193f6fda1bd0b4cf5197e0288db41bf44fbe0ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3F 10776 bytes
font_02_sfnt_off0000b34e.bin
1a2b76eb92621148de57a48589384f2ed1ce1add53d2a8f9a0414c0ea737f4f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB34E 16148 bytes