Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bbc8678f9d7e68…

MALICIOUS

PDF

34.0 KB Created: 2020-09-14 01:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01d9928b5c41ff83640c8035141fdc75 SHA-1: a7fd5dda72547863598360567c4d4ce684457c5c SHA-256: 93bbc8678f9d7e68bc8d4ec58903b6b782adfdca3627023f454ee8513f0290dd
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a tactic to distribute malicious content or phish users. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=power+pamplona+walkthrough
    • https://static.usrfiles.com/ugd/6c98bc_0e6e3d8a2ba345da923a6febf3413347.pdf
    • https://static.usrfiles.com/ugd/271e65_bfc3e7d3fdd146fd94dfbc154a16f506.pdf
    • https://static.usrfiles.com/ugd/e4d7df_38c627c4ec634a3cb7d692b1ca5fb4f7.pdf
    • https://static.usrfiles.com/ugd/97aff7_68f53ca328f94ebb953d97fa9111e29f.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/kixagagawozovut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/6364871259.pdf
    • https://static.usrfiles.com/ugd/e4ff69_9273b6eff6ab43bc819ca0f8b42aed0e.pdf
    • https://static.usrfiles.com/ugd/665c20_8e4dcf7ee17649c282f94313692531a7.pdf
    • https://static.usrfiles.com/ugd/8cbfce_400a029908aa4f61bd5f60fef1217be9.pdf
    • https://static.usrfiles.com/ugd/b91566_10160e31b32c494983b8241168c36070.pdf
    • https://static.usrfiles.com/ugd/63f22d_41fd06b6463b453abe862027ca43a960.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_off0000480c.bin
cdc411dba3e6dac46d87bec5bead5a8b774f8a0a806a8086c63c4584eb219c2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x480C 5212 bytes
font_01_sfnt_off000059ad.bin
ad3c71717da3755c95d4a2cd9926985eeb30c0644d7c929a1f394581983717bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AD 9960 bytes

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