Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dd32cc9d697c23…

MALICIOUS

PDF

79.3 KB Created: 2020-08-31 01:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d64f2b1ade391a8bf133ebe0c50d1c57 SHA-1: cd1f0e817a65e7e534759b122a6fc88d6788b07c SHA-256: 47dd32cc9d697c23ba72c8f23203104a78012e6a84dfa24e2a0aaa33c45152f3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. The embedded URL 'https://ttraff.ru/wix?keyword=tech+n9ne+greatest+hits' is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, suggesting it's the intended lure. The file type and structure are consistent with phishing or malware delivery.

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.ru/wix?keyword=tech+n9ne+greatest+hits
    • https://static.usrfiles.com/ugd/e3834b_7fbe22fd477b46019c5058f5ab5858de.pdf
    • https://static.usrfiles.com/ugd/1f6d71_c4c464c5d89946a4b13f08f98d4012b4.pdf
    • https://static.usrfiles.com/ugd/eed56f_a9803597737b4ec19a1261d26621efc2.pdf
    • https://static.usrfiles.com/ugd/5ed537_a2821500dd2d4882b6fb7282276822ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fff7b68288c4d4aa3b5cfc398ae3d2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbc11f2d3e3a4b10820ca7c305db3b2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ba1d084c5234a77990e9413f8821f85.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/xesabezevadiwekovine.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/weruvaxoruxetido.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/jewemopeteludujuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/oxford_advanced_learner_s_dictionary_9th_edition_international_student_s_edition.pdf
    • https://static.usrfiles.com/ugd/b8c837_465b0c3ebe4b43219b3f6ec87d22ccf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b37cb7d5ce14beebf8bb283dede45f2.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_off0000f8b5.bin
6c036444b21dd40a3919ad5e7853cc21e2120f814c8e9427525f9787d768daf9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 5132 bytes
font_01_sfnt_off00010a22.bin
32a933e6d55986073f72d90b797464a70b59e2f47dbfceb4805127ccd5e58f16
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A22 11292 bytes