Malicious PDF — malware analysis report

Static analysis result for SHA-256 f115b9816e1533b4…

MALICIOUS

PDF

47.3 KB Created: 2020-08-30 01:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0fb8ff72c7974be39052e304603d544 SHA-1: 914b95b7b738644a4cffe47c475960834b8fd660 SHA-256: f115b9816e1533b45922466ce8ddeee2392fc7dab6414643157137daf65cc435
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, appears to contain text related to 'tv shows' and the malicious URL, suggesting a lure to a content-piracy or scam site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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=tv+shows+you+need+to+watch
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/85734341104.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/wiring_simplified_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8226/0384/files/2009_full_movie_download_tamilrocker.pdf
    • https://static.usrfiles.com/ugd/ea2f88_cdec9624ff3c47eb8862d0e48b59349c.pdf
    • https://static.usrfiles.com/ugd/d5415a_5bb5470add754c7db233c8302e77fccd.pdf
    • https://static.usrfiles.com/ugd/07625c_cdcf6579314840349264e164614501aa.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_a2fb47f313414515b2dad947b7181e8a.pdf
    • https://static.usrfiles.com/ugd/fa6f14_49419a8b1ce349e7938e7116dbf799bb.pdf
    • https://static.usrfiles.com/ugd/5b9a87_7e9c8672d3b54850b337236ea665c3f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_41cd3becc36648eb92556877ce68099e.pdf
    • https://static.usrfiles.com/ugd/89064d_922711fc112746e8a6e20cee92c6259e.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_off00006ddc.bin
3394ec5c4f1525b2e7bad78c216a5c4636155585d800260d15ea211cbd657ba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 4936 bytes
font_01_sfnt_off00007eb1.bin
364a48b0e3babda99a16e4ae8f9cdb7fb7ee1e5a6a85f3898e81f0e76b2414bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB1 10504 bytes
font_02_sfnt_off0000a2ad.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2AD 4324 bytes