Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0957813fbb7285…

MALICIOUS

PDF

62.8 KB Created: 2020-08-31 04:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12d4a3874ec3c8d6309d63b9a26b27b SHA-1: 78d82171dc70a44a5d2d76c9c36e14edd0d8b1e5 SHA-256: 0f0957813fbb7285f1a692508f0748152b929149a8d08925ad1cc787ff8ad227
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign but some lead to potentially malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a phishing or malware distribution site.

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.com/wix?keyword=rwa+lee+enfield+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f0f215_61cb9aaff39e4198935e8d1519a0f06f.pdf
    • https://static.usrfiles.com/ugd/cf14a4_636ce76a72974b499022b8525022a4fe.pdf
    • https://static.usrfiles.com/ugd/34e21e_8138bf6acf6144f188a714847c7c5946.pdf
    • https://cdn.shopify.com/s/files/1/0437/5101/4551/files/10000181107.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezax.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3791/files/glencoe_algebra_2_homework_practice_workbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/gaberira.pdf
    • https://cdn.shopify.com/s/files/1/0431/2324/5216/files/47761011222.pdf
    • https://static.usrfiles.com/ugd/d01287_8d1372abbb184b1ea90cdb78fb38e295.pdf
    • https://static.usrfiles.com/ugd/eaf48f_ebbf10ce69584b7b98cab548997a00f1.pdf
    • https://static.usrfiles.com/ugd/23b571_88abfe06b2c74685a63ee454ac64d1a8.pdf
    • https://static.usrfiles.com/ugd/136d07_e53f6961e6f8490c904e457a1368fa13.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/actividades_para_nios_de_primer_grado_inicio_de_clases.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/popix.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/catalogo_de_cuentas_de_empresa_comercial.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5aa.bin
2a0edfe3648e1bb4d01bf6ef42117b79062226b10cc0ba19a0342d94f3e82700		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AA 4880 bytes
font_01_sfnt_off0000b64b.bin
1b202fe63798c2c3e2f1c8a0687d2a0a68d5f0782db509267585cb366fa5d00e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB64B 10144 bytes
font_02_sfnt_off0000d94d.bin
73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 16060 bytes

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