Malicious PDF — malware analysis report

Static analysis result for SHA-256 43326a3c9113441a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-30 22:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95b7f516618ee99006a24675c67642f7 SHA-1: 28cb029acf3242e87ed0745b0a5081b9f8c8ef8b SHA-256: 43326a3c9113441a6d5d14c6bd369b9389453a67bc8843abc020745513f4cbab
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=kostenlose+under+cover+spiele'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of embedded links, with the first being 'https://cdn.shopify.com/s/files/1/0437/4098/7543/files/45556187785.pdf'. The document body, though heavily obfuscated, contains the same URL as the redirector. The primary attack pattern involves luring the user through these links.

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=kostenlose+under+cover+spiele
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/45556187785.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/77424595692.pdf
    • https://cdn.shopify.com/s/files/1/0432/2869/2643/files/lafexinavuloj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/79426986553.pdf
    • https://static.usrfiles.com/ugd/8d57bd_3fdf49dd13e648e582b077cffa18deb3.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/pokasexizedupejonev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/58853156977.pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/8453179683.pdf
    • https://cdn.shopify.com/s/files/1/0451/0570/9219/files/diagenesis_catagenesis_and_metagenesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2458/8701/files/78593158407.pdf
    • https://static.usrfiles.com/ugd/b8c837_92074b9a757c491eba549f6adecaa1e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0d5b98ae2c345e687de2430eed04006.pdf
    • https://static.usrfiles.com/ugd/efb3f0_3a1da05a163e41e99372be287abdbd0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_98354f1194a24134a6492c032af1aa61.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4bf6b409ea74fed8cf0887e40321912.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_off000069fb.bin
3b45da3cd355c2994c29b11e763630e6235d570eeeaea920bf0d3d45ff3c3fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FB 4884 bytes
font_01_sfnt_off00007aae.bin
b1a2e5b55213c584c6b6d3f52bea82cddcbd35fdcf4cd427c237bf4f005a46b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAE 11080 bytes

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