Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35ba08e793f6675…

MALICIOUS

PDF

43.1 KB Created: 2020-10-07 22:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4c8a9abde2b504ba939eb61f587fb90 SHA-1: acc8cd1fa7a4ac9a3f48b925e084c7599e9ba280 SHA-256: d35ba08e793f6675946e5e8b59605abd494acf5a0c35ed6a7d743d54091076f3
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary mechanism for luring the user. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or redirection scheme.

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.
  • 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/pify?keyword=talking+to+my+daughter+about+the+economy+pdf
    • http://files.luettenwohl.shop/uploads/1/3/1/3/131384583/vonopun.pdf
    • http://julupifig.dollslakesidebb.com/uploads/1/3/1/8/131871816/newemekir.pdf
    • http://xewolol.loridanenberg.com/uploads/1/3/2/3/132303189/be38b143.pdf
    • http://kolugilaj.kasrakaviani.com/uploads/1/3/0/8/130873848/6337290.pdf
    • http://files.slehschoirs.com/uploads/1/3/1/6/131636632/palokiganevo.pdf
    • https://site-1038982.mozfiles.com/files/1038982/xadevoguremunup.pdf
    • https://site-1038606.mozfiles.com/files/1038606/xaluwamadusav.pdf
    • https://site-1040558.mozfiles.com/files/1040558/31045144624.pdf
    • https://site-1037276.mozfiles.com/files/1037276/39626118879.pdf
    • https://uploads.strikinglycdn.com/files/ebfe81c0-5e1f-4183-b523-de5bd80e48a4/36263265514.pdf
    • https://uploads.strikinglycdn.com/files/c2e00a2f-be53-4e0f-a3bd-b876a980780a/11245468764.pdf
    • https://uploads.strikinglycdn.com/files/4c6dbcfb-0655-47e3-ac89-80c77ec9e19d/75065060959.pdf
    • https://uploads.strikinglycdn.com/files/081aed84-ddbc-49be-9262-2d953863d240/25365129993.pdf
    • https://uploads.strikinglycdn.com/files/44ad1b17-ec01-4185-9e7b-01da1ca4fde3/kofufuga.pdf
    • https://uploads.strikinglycdn.com/files/411c4961-3bbf-4b70-90d6-8c6add3b0e16/tulofikimasodizat.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_off00006582.bin
e3f5d479fccf5f057a1976f53a39f576dca2c79ed914b62bb5494f60cee57f4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 5644 bytes
font_01_sfnt_off00007892.bin
3a7fe0cd9731c10a4789240f73222bc2b2ca6be2802ed912149567b16b4af4db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 13292 bytes

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