Malicious PDF — malware analysis report

Static analysis result for SHA-256 995ec8afbf0ee607…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 06:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9b7f57a36817e1ea45d2c3d307ebba SHA-1: f2c19b3d81b004065a585fa1315f2a34d231c90a SHA-256: 995ec8afbf0ee6077f5cd0e723cf8dbc37ce04f9ee504909ac0e7c26ad827aca
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common technique for delivering malicious payloads. The document body text, while partially corrupted, includes the same lure text and URLs found in the heuristics. The presence of a link farm further indicates malicious intent, aiming to distribute the malicious link across multiple seemingly benign documents. No scripts were extracted from this sample.

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.cc/pify?keyword=feasibility+report+on+catfish+farming+in+nigeria
    • http://files.brockeastman.com/uploads/1/3/0/7/130776542/2603587.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/fuzajiloritafuwuzaxovozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/ligigiveso.pdf
    • https://cdn.shopify.com/s/files/1/0459/5656/3103/files/ram_bhagwan_photo_hd.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/physical_science_grade_11_platinum_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3553/files/income_tax_calculation_statement_form_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/livingston_international_pars_cover_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/soviwetisujagem.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/37054970844.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/wiguro.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/manual_muscle_test_piriformis.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/lire_le_journal_el_watan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/litof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/puvuxojiluvifoja.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_off0000693a.bin
b9da5d100110058737867f07d9e08dc89b6b0c63b75be33c5bc5c03568e43a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693A 5628 bytes
font_01_sfnt_off00007c31.bin
5962702f04e261073c091ab6013e5961b8786931ef82bc49fa6cfb274ca7cd06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C31 10296 bytes

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