Malicious PDF — malware analysis report

Static analysis result for SHA-256 e962b378f4b2f805…

MALICIOUS

PDF

52.5 KB Created: 2020-08-31 18:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ca507acfa8e20c81a72eda88fd930f5 SHA-1: 349ba3387297486e8b0bec5bfb3f99e72589d7aa SHA-256: e962b378f4b2f8053f677feaeec6c4bc8018154dfdcecb745473d26f01db3d50
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link that redirects to a known malicious domain, disguised as an answer key. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO manipulation or to distribute malicious links. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=rsmssb+ldc+answer+key+2018+pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/countable_and_uncountable_nouns_list_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/4506/7684/files/48798605703.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/adobe_indesign_newsletter_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7786/files/convert_to_word_adobe_acrobat_pro_9.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/candy_candy_final_story_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7641/files/14694559897.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/6485176063.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_83fc0f75b38245338e87e533be8e6a3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c523a31869c47538eeaff3ab465aa72.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ce99a55629c4b23afebda09f8cda3de.pdf
    • https://static.usrfiles.com/ugd/b27199_682b0da26d1a4663abf5059d6d265e4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4b7d39b72a64b3a9ebd791606d268f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2fbdd438ff14dfa9bc49de8c4dadc06.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf72fc765e04470a8f2e65bb3ff3554b.pdf
    • https://static.usrfiles.com/ugd/73cb9e_4b15182f170d41268e3384037a64596a.pdf
    • https://static.usrfiles.com/ugd/bae363_9901768e7333459a9569b1372aebb1bd.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fbe.bin
b58c84e1c07a089134a3340fe36ef3133d7d62f9973b5a88cf30d224b0b0a4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 6224 bytes
font_01_sfnt_off000074eb.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EB 3720 bytes
font_02_sfnt_off00008046.bin
7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8046 1936 bytes
font_03_sfnt_off0000898d.bin
4341e99e505d30b39c6b923d54b3c07941e467f97d660b607a93f0a7008d0bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898D 10628 bytes
font_04_sfnt_off0000adee.bin
cf4552ae0a07360601a9670c81d0fc405a7c2c4536b30bea29c87c57462a5fd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADEE 6544 bytes

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