Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95a63d99321ee7c…

MALICIOUS

PDF

49.1 KB Created: 2020-08-31 10:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae2d69e384798988897885b7b0ffea7 SHA-1: cc9d906783870dbfba444f80458a7fe64bcfb97e SHA-256: a95a63d99321ee7cf27e01ac5451684dff0043a31df7323e6dc76fcbb4308c04
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One such link, 'https://ttraff.com/wix?keyword=number+tracing+worksheets+1-50', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL, suggesting it's the primary lure. The presence of many PDF links, including to Shopify, indicates an attempt to appear legitimate while distributing malicious content.

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.com/wix?keyword=number+tracing+worksheets+1-50
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4691/files/the_new_essential_guide_to_droids.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/learn_french_for_beginners_through_english.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_643c5159cd8a41c192586ba8990c02b8.pdf
    • https://static.usrfiles.com/ugd/2274a7_2c80e26e6f964ce4aa694b3564d238ad.pdf
    • https://static.usrfiles.com/ugd/4b874d_c1752e8adf2a4ef484cd73d527c00f00.pdf
    • https://static.usrfiles.com/ugd/6f7357_9cb7f3faa8794537a5dceb2bb1e8fdd2.pdf
    • https://static.usrfiles.com/ugd/43d598_b33c873d54b24be8b78cc97cfe0e32c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_0bb6548b729f4fb48e8f0db31111fd4e.pdf
    • https://static.usrfiles.com/ugd/c836c3_39e7a76822064d71a59002c066968a95.pdf
    • https://static.usrfiles.com/ugd/5cf23b_5a144990a87341309268f0a8a05dc25b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2f34cd483544153a5171f0f43347676.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4d831feda404e4c92f81e710a87819e.pdf
    • https://static.usrfiles.com/ugd/599f1c_b2b2316ad4894c9fa23757ce9f62544d.pdf
    • https://static.usrfiles.com/ugd/dc98cc_5af87e070dc948d798277d2b274c544b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c74718e4fbe434ea351fb67400623f9.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_off00007f96.bin
2bc63c0a5f3a392ef81aef47f76f78db5e741ee13b37d2336be9e89a281098fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 5796 bytes
font_01_sfnt_off0000934a.bin
4c0fbef91c2ab2eaa9b62838718b385f6ec4bdaa7960c12c6638d8aa618c8f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x934A 10472 bytes

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