Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee0510193679a9d…

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 01:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd8df344b8ed5c82eab1f5a46db7408c SHA-1: fc7d1cf1308a546216edc035bf277f812e105686 SHA-256: 1ee0510193679a9d7414c5f65f497f53c1c20679e57149d33cb1ee270c74acb3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, such as 'ttraff.ru'. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to academic topics and the URL 'https://ttraff.ru/pify?keyword=broad+spectrum+antibiotics+pdf', suggesting a lure to potentially malicious content disguised as research material.

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.ru/pify?keyword=broad+spectrum+antibiotics+pdf
    • http://xikubulas.jhwolfanger.com/uploads/1/3/0/8/130814397/c5b7acd5036cf4.pdf
    • http://files.werbrave.com/uploads/1/3/2/7/132740482/sokatonujitew_xepixerir_vewanasujun_lulovanexeg.pdf
    • http://wikevese.conversationcompass.com/uploads/1/3/1/8/131871453/f8d49dc86c.pdf
    • https://cdn.shopify.com/s/files/1/0439/7950/5822/files/gubupadogimojikin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4170/9462/files/fumirosuwadositarovaxitid.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/what_does_thaumiel_mean.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/tugimudumufulajoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/jinimamiris.pdf
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/57931780834.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/wolivalakup.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/tuzupujexawumigemeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/nawolojaxirurif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/38630995288.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/luwokadaxasol.pdf
    • https://cdn.shopify.com/s/files/1/0449/4888/1567/files/diagnostico_de_anemia_por_deficiencia_de_hierro.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/wemuxepi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/blend_phonics_worksheets.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007399.bin
5b9f96cfa273e73c755d67d8a954ae34a27e9aad7b208857abe07ca70c8283bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 5456 bytes
font_01_sfnt_off00008610.bin
1e9924e9579e90b5f5300869dce38463364fc172d637a86985c196bf76260772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8610 10336 bytes

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