PDF malware analysis — malicious · 21295bd9a762d510

MALICIOUS

PDF

36.0 KB Created: 2020-09-01 22:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: cc3a36aae339050ce335999d3d6c2da9 SHA-1: fb93819335baf38057be8a9359c634f46866439d SHA-256: 21295bd9a762d5105871a65cc350bcffba9c8b1ff4bef1456a9ab2834961f0a5

128 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files, a technique often used for SEO poisoning or to obscure malicious destinations. One prominent link, disguised as a worksheet, directs users to a known malicious redirector. The file's structure and the presence of numerous links suggest a phishing or redirection attempt.

Heuristics 4

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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=abstract+and+concrete+nouns+worksheet+grade+3
- https://cdn.shopify.com/s/files/1/0431/1734/6965/files/kibedalida.pdf
- https://cdn.shopify.com/s/files/1/0434/0760/5923/files/74786418549.pdf
- https://cdn.shopify.com/s/files/1/0432/4337/2699/files/bumuwazawilo.pdf
- https://cdn.shopify.com/s/files/1/0432/2839/7728/files/vuxunikojat.pdf
- https://static.usrfiles.com/ugd/5be868_f778c84f4875480e94c3dcb2dc701557.pdf
- https://static.usrfiles.com/ugd/7baf93_42c50ab1d7ad4474adad4c4af925b0f1.pdf
- https://static.usrfiles.com/ugd/89c6ad_b894cb36f9f5477c919d31049e128b92.pdf
- https://static.usrfiles.com/ugd/b8c837_a7c66bdfd47e45849508a83533fc6e57.pdf
- https://static.usrfiles.com/ugd/5926b4_cd9cf85899b24a13818f8e1f92342724.pdf
- https://static.usrfiles.com/ugd/b8c837_2c11272175974cbb830bac88bda7f0e5.pdf
- https://static.usrfiles.com/ugd/9b33c5_e2dbd6f49af54ff7ad6afebc32f9df70.pdf
- https://static.usrfiles.com/ugd/90423f_cb0574a884bd417a96646f6bd1fdec86.pdf
- https://cdn.shopify.com/s/files/1/0440/2829/7381/files/20324051241.pdf
- https://cdn.shopify.com/s/files/1/0428/6775/3116/files/morax.pdf
- https://cdn.shopify.com/s/files/1/0432/6447/5299/files/63347144275.pdf
- https://cdn.shopify.com/s/files/1/0432/7433/8472/files/makobe.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004e45.bin` `b02f85795d79612fb486008754c6a91a13b734fbacf7e9c32fe3a7d201a5a7f8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4E45	5616 bytes
`font_01_sfnt_off00006168.bin` `2a21fa028e064edeca79902d3caab648cd1f3506882e9e1d3c10a79be1ed5997`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6168	9856 bytes

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