Malicious PDF — malware analysis report

Static analysis result for SHA-256 98f4f66903bcfcbf…

MALICIOUS

PDF

74.5 KB Created: 2020-09-18 10:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30467df966bbe15e5082d3440a6f0e64 SHA-1: b393f0ec50654fc817c7bfa2ebfcb3ed6775d242 SHA-256: 98f4f66903bcfcbfeb3e8c2e5b27ef736c29189dba9c2673cdfe49b569895143
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=memorandum+of+agreement+for+partnership'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs leading to potentially malicious content. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of these malicious links indicates a phishing or redirection attempt.

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.link/wix?keyword=memorandum+of+agreement+for+partnership
    • http://sizaratag.restaurantmastercoach.com/uploads/1/3/1/3/131379550/8734584.pdf
    • http://vipisi.thesepticinspector.com/uploads/1/3/2/6/132681656/vapagopumitig.pdf
    • http://files.ogologo.ca/uploads/1/3/1/0/131070792/xowemimawibase.pdf
    • http://rewukeb.nplfiles.com/uploads/1/3/2/6/132695328/6f91b0f8e0ae2d.pdf
    • http://files.youngsdiscountbridal.com/uploads/1/3/2/3/132302941/rumegovubosogisan.pdf
    • http://files.fcuccjefferson.org/uploads/1/3/2/6/132695455/xarusole_jedesetam.pdf
    • http://files.hirechase.com/uploads/1/3/1/3/131381376/tuligemasetajeretod.pdf
    • http://batopepi.componere.com/uploads/1/3/1/4/131453501/pivure-warux-palanunonefifom.pdf
    • http://paxuvewa.journeyfromjourneyto.com/uploads/1/3/2/6/132681484/8950372.pdf
    • http://files.bozemanhelpcenter.org/uploads/1/3/1/4/131437873/zipipovalum.pdf
    • http://files.bigredlocksmiths.com/uploads/1/3/0/7/130776791/fisejokapino_golotumufoge.pdf
    • http://files.brendathour.com/uploads/1/3/2/6/132682106/badafagewoso_mavaluretolid_sotenug.pdf
    • http://files.bendigounited.com/uploads/1/3/1/8/131871787/zedamiduzul_lanapoferibolef_nusimepunun_nuwomiwoli.pdf
    • https://ee137348-de4e-4292-ace8-b4efb5b39ff8.filesusr.com/ugd/e2f7e1_f334492ab9464807bccd8418800a8327.pdf?index=true
    • https://47697056-32f7-465b-88f9-3547f753e5f5.filesusr.com/ugd/9734e7_a9a1b7fe10064acd96244e64abb778b6.pdf?index=true
    • https://e4e757d2-ebdd-467a-88fe-c5386e68133b.filesusr.com/ugd/b1277d_464b93bde28d4e569c4f7627ef7d411b.pdf?index=true
    • https://7722fee4-dd47-48f0-ad67-9e179bb98479.filesusr.com/ugd/11b39a_6da1c5f19d0b402ca5b58b1c3cf05356.pdf?index=true
    • https://2bc90d07-8c07-4035-b0e6-e75041c38a50.filesusr.com/ugd/6260fe_79080bb98b2a4ff68ba4a1f752004e98.pdf?index=true
    • 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_off0000dbc5.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 2828 bytes
font_01_sfnt_off0000e5bf.bin
b9e8c7bdf244e608d11f8de5772c02e42dad619f02335bb14540f00672f59ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 5428 bytes
font_02_sfnt_off0000f816.bin
52848e4631bda373ed4646d7b8a91bd6b1fad549d90704824a9a310398a9c6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 9992 bytes

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