Malicious PDF — malware analysis report

Static analysis result for SHA-256 887cbe4f4725367c…

MALICIOUS

PDF

37.9 KB Created: 2020-08-30 12:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f0adfc75883948e3e66a8a133811916 SHA-1: 7d5da94375eacdbfdb359346f18e18ec842bd5ae SHA-256: 887cbe4f4725367ca96d3a9b5a9ae5bf61013b48effe718a96890959a5e88fa6
120 Risk Score

Malware Insights

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

The PDF was identified as malicious due to the presence of a link to a known malicious redirector, ttraff.cc. Additionally, the document contains a large number of external links, many pointing to static.usrfiles.com, which is indicative of a link farm designed to manipulate search engine results. The primary malicious link is likely intended to redirect users to a phishing or malware distribution 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.cc/wix?keyword=laptops+with+the+best+battery+life
    • https://static.usrfiles.com/ugd/7dd30d_83a5ee6f48c246b096c68915ab7e9f68.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aecdae74ae14960af658b92618a68f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_00dd6d23b30d4a7fa91d0b87e0244c30.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e7bc79e0ba34dc097d6464112ca8e8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_29c6e5411e934a018cb052603a8311d5.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/kajabi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/sizajixilinoxaj.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_04db0fabe7f1416eb358fd625d10d639.pdf
    • https://static.usrfiles.com/ugd/b8c837_a27ceee5ee714d4b8ebded0024d36048.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/benalodetopixefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/final_fantasy_brave_exvius_starting_guide.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_off00005604.bin
4baff3099bfa6dd72d2002054d341836218676d3cdb33c48375ab8eea90f3439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5604 5264 bytes
font_01_sfnt_off000067fb.bin
16f6cc638956d171c4d727ed806c66622689701b04852fbebb1c980c18ddbdba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FB 10260 bytes

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