Malicious PDF — malware analysis report

Static analysis result for SHA-256 6faa915e96a4b64a…

MALICIOUS

PDF

37.7 KB Created: 2020-08-14 07:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9468016c53fa5955e1a36c6fc991bfd6 SHA-1: 822ae904b3991307a806458c8e2c006133c4223f SHA-256: 6faa915e96a4b64a74280527be138813769ff4ca153f5c64537997cf3aad111a
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, ttraff.com, which is known to host malicious content. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or redirection attempt. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=toddler+bell+bottom+uniform+pants
    • http://files.nicolemaylovell.com/uploads/1/3/1/0/131070711/9594686.pdf
    • http://files.surplus-lighting.com/uploads/1/3/1/0/131070625/cab7ac2bd8.pdf
    • http://files.privatetours-shanghai.com/uploads/1/3/1/8/131856330/legubojose_gokipugotol_badikoroz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/52481743108.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2773/files/mezesumusave.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1274/files/investigacion_descriptiva_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/14501040544.pdf
    • https://cdn.shopify.com/s/files/1/0431/5758/6071/files/zizaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/81714913643.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/85452950867.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/gosekimif.pdf
    • https://cdn.shopify.com/s/files/1/0441/3197/5320/files/7392795542.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/american_pageant_16th_edition_online_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6166/files/78086720141.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_off000045bd.bin
6271d1a4e29e2c5b1efead704883a3801421cac7992f715bbb94b64a35c1014b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45BD 5160 bytes
font_01_sfnt_off00005721.bin
7be266abfde160bf12bfc1e60f1007df166b9ad32b4b288b3b4641807394995c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5721 10324 bytes
font_02_sfnt_off00007a53.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A53 4324 bytes

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