Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae55bce9a2200ac9…

MALICIOUS

PDF

49.0 KB Created: 2020-09-05 10:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7227616f9c7a31d245545e7aca7f9525 SHA-1: 3da746a12f648ce903145808eebf523701ec39d8 SHA-256: ae55bce9a2200ac93368d9bb436cd1e6d7c713d66c260640a2110f5edef559e4
128 Risk Score

Malware Insights

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

The PDF contains a prominent call-to-action button and embeds multiple links. One of these links, 'https://ttraff.club/wix?keyword=brain+games+full+episodes+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other benign-looking Shopify links, suggesting a lure to a malicious site under the guise of providing content. The presence of a malicious redirector link and a visual download button strongly indicates a phishing or social engineering attack.

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.club/wix?keyword=brain+games+full+episodes+free
    • https://cdn.shopify.com/s/files/1/0436/4900/7769/files/gaxeziwemajowogiduziki.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/classroom_of_the_elite_manga_online.pdf
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/81306352892.pdf
    • https://static.usrfiles.com/ugd/c3f88d_00283a3087a446b38380fe2b3287f702.pdf
    • https://static.usrfiles.com/ugd/cec570_82859622179343afac718ac137fd687b.pdf
    • https://static.usrfiles.com/ugd/493135_6139cb31f36444a5acb089fae7c6aa00.pdf
    • https://static.usrfiles.com/ugd/22739b_09d7f6ff398d4396b29495fce8d0586c.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/behavior_driven_development_with_cucumber.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/40162282979.pdf
    • https://cdn.shopify.com/s/files/1/0463/0383/8370/files/267912825.pdf
    • https://cdn.shopify.com/s/files/1/0448/7466/2055/files/boson_x_free_mac.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/
    • https://static.usrfiles.com/ugd/22739b_09d7f6ff398d4396b2

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008103.bin
d8b792ac675c21264f0698d37829e6b565268383e21eb96d33231de5f192f19a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8103 5408 bytes
font_01_sfnt_off00009354.bin
633187dcabbe2ded84980a84d5b2675025cdbc41860a500ec6572a6cdf394b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9354 10488 bytes

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