Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e80b7e48278d9c…

MALICIOUS

PDF

38.9 KB Created: 2020-08-31 00:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a641814a912dfb093f18b95c43db8044 SHA-1: 3be3b8d733f98bd4ef67288111ba5eee571ce4cf SHA-256: f3e80b7e48278d9c2200814eaeb3c50403142974d75a9b67a6f13a7d170d02e1
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or redirection attempt. The document body and embedded URLs suggest a lure for a free ebook, which redirects to the malicious URL `https://ttraff.cc/wix?keyword=la+maquina+que+cambio+el+mundo+epub+gratis`. This URL is likely used to deliver a second-stage payload or lead the user to a phishing site.

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.cc/wix?keyword=la+maquina+que+cambio+el+mundo+epub+gratis
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/iis_configuration_file.pdf
    • https://cdn.shopify.com/s/files/1/0433/8843/6643/files/wotudiluwulomuwomadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/coliform_bacteria.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a7a3304c6474d6ca47f26549268ee81.pdf
    • https://static.usrfiles.com/ugd/804ff6_2d75db1768cc44e9bd3cb3cb098beab6.pdf
    • https://cdn.shopify.com/s/files/1/0465/9062/3909/files/beauty_cam_camera_apps.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/balanopostitis_pediatria_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/60388728882.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/50107029815.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/totinajimudipedivetukim.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_off000053af.bin
7d666050d10a4525424cf321f87b89316aef6cabe366b91243fdc69e038dbd62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53AF 5600 bytes
font_01_sfnt_off0000668d.bin
bac8938686a12e8dd3503b9146a083e0615554c52b7ea03f7aa596da5b6058f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668D 12084 bytes

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