Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c6255736c887ce…

MALICIOUS

PDF

83.9 KB Created: 2020-09-19 17:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2277c651c9d7464bfcabbcf6f5d4ddee SHA-1: 0b3f1cbf7eb3f9672958ea31c2bfe3962a24741b SHA-256: 79c6255736c887ceaa65f4ddd6b361c41e29049ee4c23edab425fd4044de1aa4
170 Risk Score

Malware Insights

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

The PDF contains a lure related to 'mystery manor cheats' and embeds numerous links, one of which is a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains a URL that is likely intended to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=mystery+manor+cheats+chapter+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/dillards_return_policy_no_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/91008854136.pdf
    • https://cdn.shopify.com/s/files/1/0450/9263/4789/files/blood_compatibility.pdf
    • https://5d356767-58b4-4189-a986-492da17eefd1.filesusr.com/ugd/97aff7_ee28439158c4449f9553fb9476ac96e5.pdf?index=true
    • https://6f2e1e90-6ce5-4942-9ee1-58011b44b8e3.filesusr.com/ugd/a771bd_6e4b1319544540419ee175fb56bb665c.pdf?index=true
    • https://0a59fb4a-e9ed-4c49-9caf-9dd1f291e603.filesusr.com/ugd/4d935e_61cd406ccb75496f9a95081b46dc8117.pdf?index=true
    • https://0998b24d-daff-4c9c-a56f-098f25f76cb6.filesusr.com/ugd/7e84b7_2f2fabd158064afb858201975ae37308.pdf?index=true
    • https://e797eb74-418f-43ba-a25a-562fd926d414.filesusr.com/ugd/c79b1c_4c75909c55324dd7bb900d0c05321181.pdf?index=true
    • https://2f6ea812-cccd-4e58-9a1d-a03d0a9074f9.filesusr.com/ugd/3402b1_43c21cc9e1834b4881ae10504b65d5d4.pdf?index=true
    • https://9eb3cf16-ef1d-4422-8fbe-13720832b75b.filesusr.com/ugd/af0aa9_035bb02ab66c47598d554d310e2458af.pdf?index=true
    • https://3eef80f3-d24a-4c8e-a603-9b13c6d66470.filesusr.com/ugd/cdfdba_2e6f464186dd4f9d98ecb95c245d634e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/neoness_porte_de_vincennes.pdf
    • https://cdn.shopify.com/s/files/1/0439/1131/5611/files/descargar_tutorial_de_excel_2013.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/vipolomibokalad.pdf
    • https://cdn.shopify.com/s/files/1/0460/7098/8964/files/kirim_email_formal_bahasa_inggris.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/mikepamepanisalidad.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_off00010b90.bin
a0600625097c2ec8f0884102bd192d346bf6dbfe2dd91c4556aa729f1640618e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B90 5444 bytes
font_01_sfnt_off00011dfc.bin
d649332e7b2fcabd1c3c56b3c62bc4bb39f4abb252b5979f284e1c57fe7c9321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 10508 bytes

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