Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ee3880ee01975a…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 12:23:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d4db001ef0e2a61fe9ff5ad7b3350cd SHA-1: be09129ba5fce5f4fa183113a45337a6ac2b044e SHA-256: 14ee3880ee01975abcdc610fee382e32ace24bcc0b287da91e3e8ae8d6a6b15e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on ttraff.com, which is known malicious redirector infrastructure. The document body text, though heavily obfuscated, contains a reference to 'Google calendar 2019' and the malicious URL, suggesting a lure to trick users into clicking on the links. The presence of numerous PDF links indicates a link farm strategy to distribute malicious content or traffic.

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=google+calendar+2019
    • http://files.joybloomsatlanta.com/uploads/1/3/1/4/131483685/8738896.pdf
    • http://files.pameladvorakblog.com/uploads/1/3/0/7/130739974/lotozabemib.pdf
    • http://fisasemu.gingersnapsapparel.com/uploads/1/3/1/8/131856602/b30b199509786.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0464/6374/6200/files/collectible_barbies_value_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2965/files/algebraic_expressions_for_class_6_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/92457288428.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/vubugajejalafa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/fogewifakugobipefej.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/futeduxigamiwotaturiwaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/noboduxiwemalip.pdf
    • https://cdn.shopify.com/s/files/1/0434/9604/6752/files/vorawusaluwimowoluviwujof.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5319/files/juxez.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6279/files/manual_blood_pressure_cuff_calibration.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_off00006238.bin
acef1d87f3332cd60a69ab1ffe22b6617c9365c9971da4a50bc4bf4325e64a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x6238 5444 bytes
font_01_sfnt_off000074ca.bin
2a8795314a4601338cb36dafdf2d3a30e9583b417146cf637be5fd73e1c2be42
pdf-font-stream PDF embedded font (sfnt) at offset 0x74CA 10316 bytes