Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0df82d4036347e3…

MALICIOUS

PDF

42.8 KB Created: 2020-09-18 10:40:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4d1a6fb28f6f8eebf3051af82a85fd5 SHA-1: dc20060ccd110f72ac54237406e49fbeb619abea SHA-256: c0df82d4036347e388d17038824619aef318ed59c839a53ce190ed662c6787ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a malicious redirector link disguised as a download for 'My talking angela mod apk'. The document body is heavily obfuscated but contains the primary malicious URL. The PDF also contains a large number of links to other PDFs, suggesting a link farm or redirection chain. The ML classifier 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.club/wix?keyword=my+talking+angela+mod+apk
    • http://files.rhinedesign.org/uploads/1/3/1/1/131163667/ruwuk_pomusob_zijojolato.pdf
    • http://vilite.leanwithluke.co.uk/uploads/1/3/0/8/130874575/6249439.pdf
    • http://bemeni.skipworthinsurance.com/uploads/1/3/2/8/132814930/8853202.pdf
    • https://0bf3f075-f2d1-42c9-8499-93dd0d8fb223.filesusr.com/ugd/a51aec_b461236ff101480a88f2ce4dfb711582.pdf?index=true
    • https://ba686cb9-214c-4aa6-bb37-e8186bed64e5.filesusr.com/ugd/bba345_4d75ff9556f247e48fbaa56d38e9f7dc.pdf?index=true
    • https://8e56627b-1b15-46dd-9966-4700d8c7c98e.filesusr.com/ugd/289c5e_2b61e396081f4460969bb51f38b35d0b.pdf?index=true
    • https://2d8f929a-d03a-433c-ac40-088524f42d27.filesusr.com/ugd/ee9d3f_2a56128cc63a45e5883fe7ee1162f260.pdf?index=true
    • https://c20604e6-355e-4a9a-9367-a631e79b6230.filesusr.com/ugd/89602e_6af73bcb3d33414ba34a4b8f1b99ad6d.pdf?index=true
    • https://1cee0fa6-64b1-4c0f-8895-50611612f795.filesusr.com/ugd/95ea6b_09f516b4f3d74d7ca6788c442677e90f.pdf?index=true
    • https://f4453d96-7a70-4b04-9307-816e69ed8c01.filesusr.com/ugd/162fe6_477b654d3d224b6c81e94379a8d86ea4.pdf?index=true
    • https://7cf3c4ff-3cbb-46d3-ab01-835481675edd.filesusr.com/ugd/694d5d_ac3a78d9bb9b483c8bc5aa3bed8d2e81.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/artist_web_design_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2555/files/cognos_10_report_studio.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/65320603770.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_off00006874.bin
3d8c10d948791c478009d7fbdbe7e51c4503b5cc4ef4e6801e55b2254c3428c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 5176 bytes
font_01_sfnt_off00007a1d.bin
6530ba2bce9af4d1b63dc1e556c5161620f2b44f28e8a9d65b81935da7f25a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1D 10640 bytes

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