Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3bedb677b30d67…

MALICIOUS

PDF

61.8 KB Created: 2020-08-04 03:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 763e64f5adb4272447885282ac053627 SHA-1: 82eff4ced486d20181956410a24dba2bf44b5cd3 SHA-256: 0e3bedb677b30d6770a9adebe06ae3b9a52349644816d5ffddc4c14b525a543a
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, creating a link farm. One of the primary links redirects to a malicious domain, suggesting an attempt to lure users to harmful content. The ML classifier also strongly indicated maliciousness.

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=history+of+italian+renaissance+art+pdf
    • http://files.robohawks1985.org/uploads/1/3/1/4/131453665/b2cb738ae6.pdf
    • http://files.wandaslittlehands.org/uploads/1/3/0/7/130776162/jijepuvalixaxi_bujezubogo_xugawimusu_bepegovifibisip.pdf
    • http://files.allsteelinc.com/uploads/1/3/1/4/131408942/xigujex_jonuva_jidonuvitivobo.pdf
    • http://files.alvin-hwang.info/uploads/1/3/2/6/132682739/muvulut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/down_in_the_dm_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/6880/8613/files/26921427935.pdf
    • https://cdn.shopify.com/s/files/1/0436/4340/4441/files/25263243198.pdf
    • https://cdn.shopify.com/s/files/1/0429/3433/7695/files/xupisuwesemi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/ripidinoladupofejoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/9108470623.pdf
    • https://cdn.shopify.com/s/files/1/0430/9388/5089/files/16164726875.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/xagogaxopijunod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/zawelatewojozetudim.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/97636390515.pdf
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/sepoxezogogazubafomudizum.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/befurokurepalo.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_off0000a798.bin
cbcb5f3080ee561f8c0e4d5b05bf0885fe4b13a210694ccf0f4ea4e726552f1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA798 5000 bytes
font_01_sfnt_off0000b8a2.bin
7e20ebbb0dd9032c0a8b64bf4a463ed5cf8cb36b1b031212af8ae95e269ccaa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A2 11004 bytes
font_02_sfnt_off0000dbfe.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 4324 bytes

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