Malicious PDF — malware analysis report

Static analysis result for SHA-256 620b3c399e38234c…

MALICIOUS

PDF

51.5 KB Created: 2020-09-08 16:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c76dd64b04b4eb8323245518aa92676 SHA-1: f0c773173926498d77b3e1c71b189cdb62d4d3a9 SHA-256: 620b3c399e38234ce8a5b179cb980877b2f5a19a5e779930eddb2071faab2719
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically advertising 'hd bollywood movies'. The primary malicious URL identified is ttraff.club, which is flagged as a redirector. The document body, though heavily obfuscated, contains references to this URL and other benign-looking PDF links, likely to mask the malicious intent. The ML classifier strongly indicated maliciousness.

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.club/wix?keyword=hd+bollywood+movies++full
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/735424_5eff3bcc775a44e88de7c6c691469115.pdf
    • https://static.usrfiles.com/ugd/b52961_59c9e65364384de0ab2e982bf03c259e.pdf
    • https://static.usrfiles.com/ugd/02beb7_ecb7ae790341442b8bb2bb4d8052d624.pdf
    • https://static.usrfiles.com/ugd/49488e_5d826e37f1ae4bfbbf1ce851073870ab.pdf
    • https://static.usrfiles.com/ugd/66c878_139998f8299f47668b46b9c535d8a415.pdf
    • https://static.usrfiles.com/ugd/89441e_cca9354f2c7240b190d7761b1fa7098a.pdf
    • https://static.usrfiles.com/ugd/191a6d_faa1da35d3ae4228bf58657143921dff.pdf
    • https://static.usrfiles.com/ugd/3aca14_60715787a9cb4e8b96f4e2d6a5373ae2.pdf
    • https://static.usrfiles.com/ugd/80bfa9_226db9f9d5e94f5f88cab1d362c442fb.pdf
    • https://static.usrfiles.com/ugd/430cb2_d3c6829d4676493bab04bde593db9b9c.pdf
    • https://static.usrfiles.com/ugd/895bef_3ab0e3c4e83a479c9ffab7f93ef74de7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dd701a1a1a34f57acba642faf80095b.pdf
    • https://static.usrfiles.com/ugd/48f461_87cd2f65874a43efb4bedf40301b8520.pdf
    • https://static.usrfiles.com/ugd/d32f78_1d788f106d134630ba9d900dd270061e.pdf
    • https://static.usrfiles.com/ugd/e9cba9_8f05ef56e9f747d7b8d3383440ca5c41.pdf
    • https://static.usrfiles.com/ugd/2b3f46_9d6c19a22e264a10bf9df6d92478a05a.pdf
    • https://static.usrfiles.com/ugd/b8c837_45eea6fc25a44ca69e9ed652ba3cb6c1.pdf
    • https://static.usrfiles.com/ugd/a76634_a8481929086a458592fa083ceb6f81b9.pdf
    • https://static.usrfiles.com/ugd/8e1900_d865e358e8084d5eaaef45ed4eb3cfa8.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c3.bin
47d53277bbeae199b4c7221cea212019525d8f50b6a76c2da40facaa8c750181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C3 4800 bytes
font_01_sfnt_off00007932.bin
0e9ed625233c54a6de2e6527e60f95300f0d8bc49d1598a9b7943c52f1a5ba30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7932 10304 bytes
font_02_sfnt_off00009ca6.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA6 16164 bytes
font_03_sfnt_off0000b1bb.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BB 4324 bytes

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