Malicious PDF — malware analysis report

Static analysis result for SHA-256 136dad7d4d5f14c0…

MALICIOUS

PDF

45.1 KB Created: 2020-09-09 22:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7fa6d4902ca92728b6b1172535c89aa SHA-1: d97df3ff249d0c30d6c3d812e597d8cbe411f69c SHA-256: 136dad7d4d5f14c051fe01999130c46cf9f9e4ea4ca48fa2344ed4c0cc4ae3a6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one redirecting through a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Canon pixma mg3510 software', suggesting a lure to trick users into clicking the malicious links. 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.link/wix?keyword=canon+pixma+mg3510+software
    • http://files.southcoastdesign.co.uk/uploads/1/3/0/7/130775918/kolodufijoxib-wegipopebiz.pdf
    • http://febim.sgcaphilly.com/uploads/1/3/0/8/130874631/8f778.pdf
    • http://files.thekookas.com/uploads/1/3/2/3/132303230/nusoluwemef.pdf
    • http://files.breakthroughlocal.com/uploads/1/3/0/8/130873927/jogadalep.pdf
    • http://sinubov.unlockyourhigherpotential.com/uploads/1/3/1/3/131383483/3630661.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/86319b_dc0eee16b47d4f77a47c288e04b46bac.pdf
    • https://static.usrfiles.com/ugd/824332_0dd0503533e541d79bf1b577e6b715cf.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_aa8c5af70c3145c38e5d027b1c64f859.pdf
    • https://static.usrfiles.com/ugd/3c8574_ea98cb4a30654c1fa76065d5e5b695d6.pdf
    • https://static.usrfiles.com/ugd/0c41e7_e3aac5de9c224bee80674c37362bb403.pdf
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/three_column_chart_template_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8594/files/xodanazekagidoruru.pdf
    • https://cdn.shopify.com/s/files/1/0439/0351/6824/files/johor_corporation_was_formerly_known_as.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7715/files/nunizuwanobobubosuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6111/files/resuwevusu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6643/files/master_form_kh2.pdf
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/vojumuzuwuneduso.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_off00006422.bin
00b6d6945a9adabeabb581ce94500e331fe7962d358696f86e65ace62bf0c488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 5736 bytes
font_01_sfnt_off000077c4.bin
ef1e2ecef599900588f4ef7549438f1e820885f628476528f8bc480eab494e49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 15348 bytes

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