Malicious PDF — malware analysis report

Static analysis result for SHA-256 0309e4a938deb1ac…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 03:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 080afbc3dbb58f96ba3ed3fd95e89739 SHA-1: 3694d2e72d72e71c43a2aab644dcc3a3b20c4f28 SHA-256: 0309e4a938deb1aca7b5a2e2450f08b0bb67e3f4abd02c047cbd17ff4739b0e3
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a song remix that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to benign Shopify domains, suggesting an attempt to manipulate search engine results or distribute content. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

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=lagu+terdiam+sepi+versi+remix
    • http://tuparu.natalieasport.com/uploads/1/3/1/3/131379182/420101.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/essentials_of_general_surgery_lawrence.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9861/files/xofusupodovonaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/30224688110.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9242/files/download_adobe_after_effects_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pusowa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/sodawowume.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0000/files/80151079156.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/76796243315.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1008/files/calendario_rusia_2020_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/54554901709.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/logupuzumidikixareza.pdf
    • https://cdn.shopify.com/s/files/1/0440/4841/6933/files/wirup.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_off00005e04.bin
6d2dbeeae8ce8d976413891cf39b060bf9f9f91cca99695429dd0573f4502e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E04 4984 bytes
font_01_sfnt_off00006f02.bin
efa5e2d1835a7b2002b16879507133a7140443c9bbb9efae52d113fa2706473b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F02 9708 bytes
font_02_sfnt_off0000904b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904B 4324 bytes

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