Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab95268e91e4ec88…

MALICIOUS

PDF

33.8 KB Created: 2020-08-16 01:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a20475ec7fbad28b41ec38ced1ec541 SHA-1: 4e53d4ce35ac2ca876409d009bacdd772f8dc32e SHA-256: ab95268e91e4ec8810a35a4ae04f1057c4af9cbec1bb4195f44e7a0b2cec541c
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy to improve search engine visibility for malicious content.

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=backing+storage+devices+pdf
    • http://files.artoflamb.net/uploads/1/3/1/3/131398461/kulivunu.pdf
    • http://files.lilypadplanet.com/uploads/1/3/0/7/130775645/furefevikivi.pdf
    • http://files.opus48choir.co.uk/uploads/1/3/1/1/131163898/tukomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5826/5238/files/65141243227.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/wakozawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/fasimexopanovemox.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/44970241330.pdf
    • https://cdn.shopify.com/s/files/1/0436/0024/8995/files/ischemic_stroke_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/cesar_roberto_bitencourt_tratado_de_direito_penal.pdf
    • https://cdn.shopify.com/s/files/1/0445/6851/0628/files/basic_english_words_used_in_daily_life.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/3d_maker_for_autodesk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1419/2285/files/2498449840.pdf
    • https://cdn.shopify.com/s/files/1/0448/1505/7056/files/formacion_de_placa_bacteriana.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/difference_between_workbook_and_worksheet.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_off000049b0.bin
93a6b3160e6935c6d46d59886ccf1c35066d44eca42b11daaa8e751876ac1324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49B0 5464 bytes
font_01_sfnt_off00005c5e.bin
a321513cefa92d511a4b6f8d72bce597d0cb9c749c1b5a3dab9d2106931bb92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5E 8904 bytes

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