Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a508fdc904d40e6…

MALICIOUS

PDF

50.3 KB Created: 2020-08-09 03:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f725b39ab25265b069b66300cd21f57 SHA-1: 383853a8ab128dccf80a6f2c61e0a765f24027cf SHA-256: 3a508fdc904d40e6dbcbee17d96ffef06c6f10055cb7ffda20b8e6ed96cad432
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=luciano+canfora+tucidide+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous external links, including the malicious one, indicates a link farm or redirection tactic to obscure the final malicious destination.

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.ru/pify?keyword=luciano+canfora+tucidide+pdf
    • http://files.thesaturdayeconomist.com/uploads/1/3/2/6/132681295/bonifaxemosuno-xavodew-ninof-pawinason.pdf
    • http://files.cardsforbravery.com/uploads/1/3/0/7/130775747/tafivol.pdf
    • http://files.rebeccabeaird.com/uploads/1/3/0/7/130739628/caf4a1.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/24761851719.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0738/files/advanced_life_support_2020_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/lemofineruwuvarurexefomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/coffee_break_spanish_season_1.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/39419207737.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/lafuwafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/vazakubifubulasuwunopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/lekijiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/jitufixevovoku.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/active_passive_voice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/mood_message_for_skype.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1297/files/cours_sur_le_cercle_trigonomtrique.pdf
    • https://cdn.shopify.com/s/files/1/0430/5443/2410/files/central_air_conditioning_system_diagram.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_off000086fd.bin
524bb78092b61e03d9175bbe26c01f3da52dbfcf69b011ef7b97cff9821ca34e
pdf-font-stream PDF embedded font (sfnt) at offset 0x86FD 4880 bytes
font_01_sfnt_off000097b1.bin
95b041c44966b4fe87ac165b74705a56ff8a41e93767fe218bca36cd522e8d3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x97B1 10720 bytes