Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81079e5a7929237…

MALICIOUS

PDF

41.1 KB Created: 2020-09-12 15:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf4b727bd864bbd99ad87d0a18cb53df SHA-1: 6d52915c62e3b682d775d970887770b6c943b3f6 SHA-256: b81079e5a792923767980dfb57715303890ab6523efda9c3bf4b6abf5b044fa8
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a redirector to 'ttraff.me' which is associated with malicious activity. The document body, though heavily obfuscated, contains text related to an 'Aggiornamento android 9 samsung' lure, suggesting a phishing attempt to trick users into clicking malicious links. The presence of a large number of external PDF links further indicates a link farm or redirection strategy.

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.me/pify?keyword=aggiornamento+android+9+samsung
    • http://wabomi.milkwelllactation.com/uploads/1/3/2/7/132712109/bfe07f125a45.pdf
    • http://files.victoriaghairdesign.com/uploads/1/3/2/6/132695719/zogina-wumivijelerevub-rugowog.pdf
    • http://files.saracatrin.co.uk/uploads/1/3/1/3/131380480/gufajaneso_zujumigenowu_liviti_dowezavo.pdf
    • http://mepat.reelectjudgetabbey.com/uploads/1/3/0/9/130969300/tetot.pdf
    • http://jukobur.sciencehillbaseball.com/uploads/1/3/0/8/130874429/ruvix_zovizuza_dimuxexitase_wovivi.pdf
    • http://files.cutcopyandpaste.co.uk/uploads/1/3/2/6/132682676/a710d0cbe.pdf
    • http://files.body4lifetraining.com/uploads/1/3/0/7/130738940/tibetuzugimol.pdf
    • https://static.usrfiles.com/ugd/a07927_f7d778ab192944a6bfecfbcfbbd95aa7.pdf
    • https://static.usrfiles.com/ugd/359e64_9dafffa476524b5c8b81023ae97208c5.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_ef9e3fb2ac3046698735ec73b81df527.pdf
    • https://static.usrfiles.com/ugd/39a0fd_62dbd8b048d742d88c559985f0d3cd9c.pdf
    • https://static.usrfiles.com/ugd/9f6a24_8b4320b995094b9ab92775b393e90c03.pdf
    • https://static.usrfiles.com/ugd/694d5d_e1f322b7213c4793a7b0fbedcb5a5f2b.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_off0000610a.bin
223cb462f99b730de0693886835228f9571caec013724a1cb4d0ec8bf70038e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 5256 bytes
font_01_sfnt_off000072d1.bin
cab0dcfcad58fac33e7639d63e1cad4049b40ac461b80d3736e4e92b0994f78a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 10784 bytes

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