Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ab7d4c8aa53c47…

MALICIOUS

PDF

33.1 KB Created: 2020-08-29 19:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f1e11fdc2fd50b020aef8add94544f5 SHA-1: 693498d6fb22f8b1d996dd2dd7129aa6a8142b20 SHA-256: f7ab7d4c8aa53c473a4119e38d217b5083e937c1503968bafb8690d5720706b6
120 Risk Score

Malware Insights

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

The PDF contains a significant number of links to other PDF files hosted on Shopify, indicating a link farm. One of these links points to a known malicious redirector. The document body contains garbled text and a URL that matches the malicious redirector, suggesting the primary purpose is to redirect users to malicious content. No scripts were extracted, and the PDF structure itself is the vector for the malicious links.

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=ne%25C5%259Fet+erta%25C5%259F+acem+k%25C4%25B1z%25C4%25B1+indir
    • https://cdn.shopify.com/s/files/1/0430/6557/3537/files/fokivovatoridef.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/code_geass_r1_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/rejed.pdf
    • https://cdn.shopify.com/s/files/1/0433/5176/9247/files/geneluf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/25697048970.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ce99a55629c4b23afebda09f8cda3de.pdf
    • https://static.usrfiles.com/ugd/b8c837_702715fdfbad4bdab1b91185ff589e71.pdf
    • https://static.usrfiles.com/ugd/b8c837_a586055689a44ff191ed48523f317cce.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfd14b0a20db4a07b04017a4f6d7075c.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/4196462432.pdf
    • https://cdn.shopify.com/s/files/1/0449/8151/8494/files/git_update_branch_from_remote.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/60435954789.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_off000041eb.bin
cc1de673ac763d1c97afddd126dbe5f2295823126a98c849a7ff54f153a9129f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41EB 5236 bytes
font_01_sfnt_off000053ac.bin
2fea6eee644ebd79f7b0a91088fc62f9c8b7d9018cacc5d8a05de750c138efed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53AC 10952 bytes

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