Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fe87396dce13a5…

MALICIOUS

PDF

35.4 KB Created: 2020-08-14 18:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 960ddb5772c6f2cf89d700e0f311ec85 SHA-1: ace9c7e58b466cf52135cb8e5eaf218140ca24dc SHA-256: 67fe87396dce13a55752ead0fc48b7abf13f8407a939f1aaf5b9111d654b5a53
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One of the primary links, 'https://ttraff.ru/wb?keyword=collins%20german%20dictionary%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, indicating an attempt to direct users to malicious infrastructure under the guise of providing a dictionary PDF.

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/wb?keyword=collins%20german%20dictionary%20pdf
    • http://giwixukaj.thebromptonman.com/uploads/1/3/0/7/130739783/65977.pdf
    • http://xodoto.worldvegantravel.com/uploads/1/3/0/7/130739777/f6de01704f3635.pdf
    • http://files.stanwayfountain.co.uk/uploads/1/3/2/6/132681199/webub_bawadevetox.pdf
    • http://files.unionists.org/uploads/1/3/0/7/130739971/2068778.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/lisbon_portugal_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/63533726865.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/xotefanovodanigebaniniso.pdf
    • https://cdn.shopify.com/s/files/1/0431/6296/0023/files/37760568644.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/paulo_coelho_libros_gratis_veronika_decide_morir.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1278/files/pexelelirozexosizibodikef.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7603/files/32760536638.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujipipokumamidepuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/kafama.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/piwotimapamigeponasugov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdf
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/official_sat_study_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/24246955175.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_off00004c48.bin
b6e17c748703537d82ed690f8c7f19f929f02bdee30d1e52d5d1d7c450bef9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C48 5484 bytes
font_01_sfnt_off00005eda.bin
86b3a19a7a03a7822626505aa808face205cd35386d7ad5d36dae5c3e678e41b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDA 10240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.