Malicious PDF — malware analysis report

Static analysis result for SHA-256 1efa2b4b3f75f13d…

MALICIOUS

PDF

44.9 KB Created: 2020-08-19 13:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 502313f531039fb1ec7af19c2efca7e8 SHA-1: 791c7371e6950cde5bbeafa40914512bc831180a SHA-256: 1efa2b4b3f75f13d7156495edddb6acbd9f305d6843242ac806cf019ba252e49
120 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 'https://ttraff.com/pify?keyword=biografia+de+gaspard+monge+pdf'. Additionally, it exhibits a PDF link farm, embedding numerous external PDF links, with 'https://cdn.shopify.com/s/files/1/0439/2307/9323/files/aptransco_sub_engineer_notification_2020.pdf' being the first identified. This suggests a social engineering attack designed to lure users to malicious sites or download 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=biografia+de+gaspard+monge+pdf
    • http://files.alikellyphotography.com/uploads/1/3/1/3/131380995/gategogofaf_rudabano.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/aptransco_sub_engineer_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/panasonic_bread_machine_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/wokasa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/zigewigekuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/fefoxukusufij.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/pdf_file_convert_to_excel_app.pdf
    • https://cdn.shopify.com/s/files/1/0437/2522/6152/files/vatanef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/rotavejokexipoxijinipagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/cristianismo_puro_e_simples_baixar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.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_off00006ee7.bin
f64d0c0898dc9da81d11bf74233825093443556643468f2bab69cdc20dc454ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE7 5380 bytes
font_01_sfnt_off0000811a.bin
9e60d060565082d00bb8c7aa9cc44e1ec082d12cab50acf84832c27911f5fb66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811A 12144 bytes

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