Malicious PDF — malware analysis report

Static analysis result for SHA-256 05aef9d7e3bd1334…

MALICIOUS

PDF

47.1 KB Created: 2020-08-24 21:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4f2162ec743fe7df06c39625a221139 SHA-1: a35e7f10e7919290e0820232bc851ec416ebd64e SHA-256: 05aef9d7e3bd13347bd2fb16c86d4d7660ff6103c94428d274a05750f6e5ddc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users with a keyword-based prompt. The document body, though heavily obfuscated, contains text related to spreadsheets and accounting, aligning with the redirector's lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm intended to distribute malicious content or improve SEO for malicious sites.

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/pify?keyword=spreadsheet+package+to+an+accountant+at+work
    • http://jadujuna.mcmasterclimbingclub.com/uploads/1/3/1/3/131379833/wesuwarad-bigegokibusuben-nalefow.pdf
    • http://files.extremechallengepuertorico.com/uploads/1/3/0/7/130775011/dixaferarep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2343/2861/files/71043199966.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/92942247807.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/porarodaxekatiruretafe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/92994061216.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/56773476049.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/22488511407.pdf
    • https://cdn.shopify.com/s/files/1/0437/5301/3409/files/nodejs_validate_email_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/simplifying_algebraic_equations.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/acceptability_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0463/2697/2571/files/faledagofugerotanebaze.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/14336384221.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_off00006af5.bin
4f27c34eb6f437d081464acaac8f15d47505743a2220b2f20ce7184c5f8f0198		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF5 5396 bytes
font_01_sfnt_off00007d4b.bin
2f0b7b147b0df3300c60f7de0c2fa7aa78a3a86ec9c66a7bd00ef18c32765f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4B 10444 bytes
font_02_sfnt_off0000a0fd.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0FD 4324 bytes

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