Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3368bd33d763875…

MALICIOUS

PDF

50.8 KB Created: 2020-08-30 08:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74736f7e0cbc01165c9bf31e769dc134 SHA-1: d26a646b74faf9a5211ad09f1c09bf2fd6b0ea31 SHA-256: a3368bd33d76387503613b5239d26cfe6469f7693c5e0f37499a8733fd37be51
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain the same URL and other benign-looking PDF links, suggesting a link farm or SEO poisoning tactic. The primary attack vector is likely the embedded malicious URL, designed to lure the user to a harmful site.

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.ru/wix?keyword=list+of+irregular+verbs+in+italian
    • https://static.usrfiles.com/ugd/b8c837_7093ddc8f9744b2aac5c360e0eaceeec.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e04b37cf8234c69b4a55d7882f1f717.pdf
    • https://static.usrfiles.com/ugd/d1d005_aa5e641f7b584133b5c0d531e99664d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e8dc1c3d41843349c66fd4d5ca0aa5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f23478dd962a49229d888a6a32ad5557.pdf
    • https://static.usrfiles.com/ugd/3e87bf_3967d025cf1f4b5b90da8dfee3eead97.pdf
    • https://static.usrfiles.com/ugd/0c268c_38d22928f3f94da4836235d791df1645.pdf
    • https://static.usrfiles.com/ugd/daca0d_dc868061b60944009097cccf5212995d.pdf
    • https://static.usrfiles.com/ugd/d5cf39_b3da30cdff9a4b51a52a8d198e706367.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/fipob.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/18481520475.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2523/files/abu_hamid_al_ghazali_livre.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/zagav.pdf
    • https://static.usrfiles.com/ugd/510a18_1d5d35b1a8ac4c268f9dec38ee209507.pdf
    • https://static.usrfiles.com/ugd/4b68be_66e2f4a291fb42199535af9b45a5e02f.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_off00008a35.bin
d7892fa2bce3606cdb676a77a112106b41157cf4eac86655c0d1f28889fa1b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A35 5076 bytes
font_01_sfnt_off00009b91.bin
ba6d2b70af9006487dabfb5353bce848e780be4232fcac817a8d9a3933149c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B91 10512 bytes

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