Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbf063dad646fce…

MALICIOUS

PDF

59.8 KB Created: 2020-08-29 23:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f620a872278fa3eef676a13a8a811079 SHA-1: d81dd6a2a7077efdfe6ba9dd15cab4f3f1caf400 SHA-256: 9dbf063dad646fce493c37f784b04ffeaa6c10c6ecd9970ff32b5c0b18c95e2f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a domain known for redirecting to malicious content. The primary malicious link identified is 'https://ttraff.com/wix?keyword=ham+radio+starter+kit', which is likely intended to trick the user into downloading further malware or visiting a phishing site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=ham+radio+starter+kit
    • https://static.usrfiles.com/ugd/b8c837_66acace23f7948cab8c857045f26fa7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_be7e26099c5243aa8b9e799859944a25.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fe2d47b42b848adbcad04c0161ee2d8.pdf
    • https://static.usrfiles.com/ugd/a18aa6_e24c4e601de24204a0db39e8a4481ce5.pdf
    • https://static.usrfiles.com/ugd/b8c837_291db2f67b824b52b040b8c96eab7052.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fab0fb2f8284ee8a177317f2dddbf43.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9dbdbcedde34bb9a4827f2800bae987.pdf
    • https://static.usrfiles.com/ugd/87d215_47786cd9bdf94206a6f669e28b843956.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc75df98817d440eaba87af0d092cd52.pdf
    • https://static.usrfiles.com/ugd/5b5da7_2b620b50d43f4183ae6e87388aaabe02.pdf
    • https://static.usrfiles.com/ugd/4dd980_1fc9102c67044c2ebb80c203dd022bc0.pdf
    • https://static.usrfiles.com/ugd/3aca14_3fb9553927e74eeaba9d8b640799275d.pdf
    • https://static.usrfiles.com/ugd/7598fa_cba3f5bd8b43431da668bccdb56fa16b.pdf
    • https://static.usrfiles.com/ugd/b3bc21_2d42b5148c354f6da97dace56d100f4e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a0982166ba4498bb3fcd0f05993b7cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e981f0564dc942ea90d5373a1c1608a4.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_off0000a0ad.bin
90229eefb5d407a2e9c39261a93d1e11973058b8aa45648b324d33da2c3ebcc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AD 4644 bytes
font_01_sfnt_off0000b06f.bin
03303ead871e5bfd7f8df9ea8dc6eb3defde66c77d5ce8b07eaf8fcdf0db8b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB06F 10476 bytes
font_02_sfnt_off0000d437.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD437 4324 bytes

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