Malicious PDF — malware analysis report

Static analysis result for SHA-256 8403e708ce2683f6…

MALICIOUS

PDF

58.7 KB Created: 2020-08-24 18:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a7bdb044b346d6d5dd5d55a364f0b88 SHA-1: 607d3dad691984b5297128e150ecd13d8c5c87f9 SHA-256: 8403e708ce2683f628b64295801448904c71a0f49caf670788c8b60e9ffce749
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to host phishing content or malware. The document body, though heavily obfuscated, contains text related to 'Android payment gateway api' and the heuristic 'SE_INVOICE_LURE' suggests a payment-related lure. The PDF also hosts a large number of external links, many pointing to Shopify, which is characteristic of SEO link farms used to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=android+payment+gateway+api
    • http://files.13dfiling.com/uploads/1/3/1/3/131398154/kewuwivuses.pdf
    • http://lajetesa.theflergs.com/uploads/1/3/1/4/131452903/935819.pdf
    • http://welodak.generationxgoesglobal.com/uploads/1/3/2/6/132695643/jofepoxidoma_sogekomumu_ludeliz_vuroju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/thus_spoke_zarathustra_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/descargar_numeros_romanos_del_1_al_5000.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5498/files/navy_bluejackets_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/60431162067.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/bagife.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/kegufivotowujeved.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/15305326926.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6f1.bin
38386971ff70cc087501b6a53f6c8ad109ead23855c448d5c4fa5ad60eda61dd
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F1 5252 bytes
font_01_sfnt_off0000b8cb.bin
7316363174d0f19410eb1bf822201714fc5d0b902174c078b113012e7cea59d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8CB 10944 bytes