Malicious PDF — malware analysis report

Static analysis result for SHA-256 7218f73e65a4474b…

MALICIOUS

PDF

35.0 KB Created: 2020-08-29 07:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87d8ed6aa31d36871826aaa43f93f5d5 SHA-1: 6066e5c088c72d64e887973ee4c4bb52b51c1687 SHA-256: 7218f73e65a4474b4db2585aa767c0b84171a84ee655e5d9104adc991778f29c
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=cars+en+streaming+vf', suggesting a lure to a streaming-related scam. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links supports a link-farm or redirection attack pattern.

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=cars+en+streaming+vf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/229905594.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0733/files/44680617229.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6865350c6904ee082f0a3b299c15577.pdf
    • https://static.usrfiles.com/ugd/b8c837_841b51e9e56641518f1ee9788556fad4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8d5142e7c894a51bdee1eaed8d5c0eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_bec0cd5018314c6f8cde5f8b6c27f117.pdf
    • https://static.usrfiles.com/ugd/b8c837_442a99682b674e5989cf22ddb6f6c15f.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6899/files/macbeth_act_2_reading_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/zidagarifupumusesijix.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/11143430166.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/misafulutalado.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9006/files/cfmoto_650nk_performance_parts.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/joginobanotapetadinizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/97463347969.pdf
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/accounting_in_tally_erp_9.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_off000042e9.bin
4be5bea6b65775bbdb30be1d36043d1ce98e4cf5713ef0f9b30314aa0b9a4634		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42E9 4816 bytes
font_01_sfnt_off00005331.bin
e2e9b51a4cfeef5504c9152b6722ca1a5ce445a50c23d6d259b04dc001ae003d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5331 8836 bytes
font_02_sfnt_off00007163.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7163 4324 bytes

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