Malicious PDF — malware analysis report

Static analysis result for SHA-256 05eb18934c5e7875…

MALICIOUS

PDF

50.1 KB Created: 2020-08-30 20:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d9681a00a1b51aa6fc7a20d7bc85f90 SHA-1: 4ab52564debf220f237f51a4cbcdcd60c14b56e2 SHA-256: 05eb18934c5e7875016542c8948955ba0e3dd9add99e3dbecf40c501d800ca98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, suggesting an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector's target. The presence of numerous external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO manipulation tactic to obscure the malicious URL.

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.me/wix?keyword=modelo+educativo+japones+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/30457610896.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lenibokufilitixesokan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/rinafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/ptk_agama_hindu.pdf
    • https://static.usrfiles.com/ugd/cac9e4_0d481ab566b241239d88d56c36687c2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_37c45fd240a541bcb1f82a62aa723d5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e6a1dd58cfee42ee9a569df62f8afcd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3250571d08e34dd3aafda7f24b4ce9c5.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/redulokodukaragejovel.pdf
    • https://cdn.shopify.com/s/files/1/0460/2255/7855/files/78945230799.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6551/files/25196951847.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/zatevi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3032/1051/files/rapidex_english_speaking_book_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/73963888764.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/posemiparetilijagufelowam.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/7033439122.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/xikaxusubelugasibime.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9589/files/autonomous_vehicles_market.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000711a.bin
cdade86b780ea7d8ca63cd5ce4810f1e4d1daed12ecc0f59365da1a3a7d3781a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711A 5016 bytes
font_01_sfnt_off00008277.bin
7bbf4bbb9a8590022649fc4ccee2c2fd0d5989479c64ab36c0cf9818ae4e669b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8277 5192 bytes
font_02_sfnt_off00009448.bin
b773e7929e19a5c1f04ad6dde3b76fd5d84a1bf3d6a359140872bac14ad126ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9448 11284 bytes

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