Malicious PDF — malware analysis report

Static analysis result for SHA-256 3914a07a030b631a…

MALICIOUS

PDF

36.2 KB Created: 2020-08-31 12:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5858aed607fb1bdc12ad93ebc0e9063b SHA-1: c707ced11852e4bf48ec8a5d5829944b2804e4d3 SHA-256: 3914a07a030b631a53654d0bcd2b8badc1e882134ad0ded093edf41550f73566
128 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one critical heuristic identifying a link to a known malicious redirector. The document body also contains a call-to-action phrase, suggesting a lure to trick the user into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=jay+z+dynasty+album+zip
    • https://static.usrfiles.com/ugd/0aab01_dffedef38b5d4d1dba67cea35f64a687.pdf
    • https://static.usrfiles.com/ugd/b8c837_0680102c75d64b889e4aaa0fcce7aad8.pdf
    • https://static.usrfiles.com/ugd/8a419d_ae8418c76f2c4072ac722c7cdf0285f8.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/dunozinogukesovawog.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/2996/files/2811918818.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/4093880328.pdf
    • https://cdn.shopify.com/s/files/1/0440/6552/1814/files/94486157540.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7800/files/47176151714.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/virtualbox_headless_start.pdf
    • https://static.usrfiles.com/ugd/430cb2_329868ac7ca7489eb4f2b74833d2d5e0.pdf
    • https://static.usrfiles.com/ugd/09273f_3c721edccda04cc29f9fc7ecf8741ceb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d77b55810b44e66b0a011550b59a5db.pdf
    • https://static.usrfiles.com/ugd/5be868_ed0a98e2f8e14d91878ec59d4a34332f.pdf
    • https://static.usrfiles.com/ugd/b48b60_9740913feacc4e4d8c8c073c5e721468.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_off00004e75.bin
15a41c3ff553e9cbfd0be4961e5d3110cb6ae68b9dae82be4920981fa1ad8711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E75 5288 bytes
font_01_sfnt_off0000606e.bin
02e7866a182a3ea2c208e9e0dcd5d3d6a684319082e137c5ed9e31f5da05e142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606E 10552 bytes

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