Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c20f03d084d78f…

MALICIOUS

PDF

39.7 KB Created: 2020-09-01 11:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b28d5312adac5331692cf5f752c82026 SHA-1: f68ce6ec6e1a85da297118036c65893b67dc1e5c SHA-256: 28c20f03d084d78f182a99dc8176d0f2792d6708952dcdad30a11bc97b01d946
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to obscure malicious destinations or to create a link farm for SEO poisoning. One of the primary links, 'https://ttraff.com/wix?keyword=all+cg+song++2019', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=all+cg+song++2019
    • https://static.usrfiles.com/ugd/83e24f_8f4190ac64384244ad1ec25d2ad96735.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d5ca008f8a04a2ea19d4dfe9f585da4.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_7ce11229de884a6fb133b926242a0d46.pdf
    • https://static.usrfiles.com/ugd/b8c837_5eab6e5f27954af4a4513c4b51667fe7.pdf
    • https://static.usrfiles.com/ugd/b8c837_192c92c0d559484dac893d6c930670a3.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/93351822871.pdf
    • https://cdn.shopify.com/s/files/1/0431/0709/0589/files/98309122352.pdf
    • https://cdn.shopify.com/s/files/1/0437/2925/6613/files/ucebnice_etiny_pro_cizince.pdf
    • https://cdn.shopify.com/s/files/1/0429/6369/7820/files/96712392331.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/talozetodakapiwexe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/tonememamuzopuraji.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/calculus_for_iit_jee_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0456/4857/6679/files/60776115621.pdf
    • https://cdn.shopify.com/s/files/1/0465/4733/7374/files/samsung_whistle_notification_sound.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/42173353769.pdf
    • https://cdn.shopify.com/s/files/1/0432/0837/6482/files/86848203103.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1884/files/30892587219.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004788.bin
baa31a4d1174e393c08d86702474535ccfd0993af7a7333b47bc171fa8206207
pdf-font-stream PDF embedded font (sfnt) at offset 0x4788 5132 bytes
font_01_sfnt_off00005923.bin
04bf8445c0d38e01f078f1ab58db685198c810f5f7c3dd6b1384c62fd11c5407
pdf-font-stream PDF embedded font (sfnt) at offset 0x5923 10036 bytes
font_02_sfnt_off00007ac2.bin
def20673b5ea764f457d5d28c9b2417eabb27001e30c715fbeaaf8ede6cc562f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC2 5992 bytes