Malicious PDF — malware analysis report

Static analysis result for SHA-256 e544fdb433a0803f…

MALICIOUS

PDF

38.5 KB Created: 2020-08-29 04:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67cf42c0c24c93f6b887c2c6bcec1bbe SHA-1: 683122329ffd120bc854533d8d9ee1efd60ee48a SHA-256: e544fdb433a0803f255dba6d905c359bfa4b07341e13c5b2215f843bb45afef6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wix?keyword=sketching+from+the+imagination+serie'. While many other links point to benign Shopify domains, the presence of the malicious redirector is a strong indicator of malicious intent. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the attack pattern.

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=sketching+from+the+imagination+serie
    • https://static.usrfiles.com/ugd/b8c837_ec80e12df15e4f289b8c212a7c91ffeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b528761116b4293acba7c73bf157c71.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e43534189b41cc86418b0eba9dd0c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8f4b5d7e0f44f5d9e1bf8966aa89c57.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/facebook_blue_badge_verification_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/repegirafovobejifisefiwew.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/10413259256.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/gusinufojibuxuvosuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1442/files/nunuzabujugefazo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/magic_tree_house_dinosaurs_before_da.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_off000058f2.bin
140ac16aeb966b01e6b9aa7bbeefa630d5dbed50b1341acbb1f632bc4a3fa275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F2 5428 bytes
font_01_sfnt_off00006b39.bin
69af02758de32be9fc489a76f9959e534af35d1b461728e39fd44cbe044dfffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B39 10048 bytes

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