Malicious PDF — malware analysis report

Static analysis result for SHA-256 0208832beff8b15b…

MALICIOUS

PDF

36.8 KB Created: 2020-08-08 20:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5749a4687951d16a9dbc7055ec5c7893 SHA-1: c14c5b1a5c580674c9a0ca38a277884a244709dd SHA-256: 0208832beff8b15be8ce1fc57affdad9770c394b33e2b14d3b09ee02ef40fa4d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure for users to click on what appears to be a free download. The presence of numerous Shopify-hosted PDF links further indicates a link farm strategy to distribute the malicious content.

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.com/pify?keyword=ant+middleton+first+man+in+pdf+free
    • http://files.1life1time.co.uk/uploads/1/3/1/4/131453993/gaxopotud.pdf
    • http://files.msdreyer4discovery.com/uploads/1/3/2/6/132695339/todisurufavafu.pdf
    • http://files.platetrotter.com/uploads/1/3/2/7/132712034/4374c5.pdf
    • http://files.cowgirlastrologer.com/uploads/1/3/1/6/131606864/2539913.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3142/7234/files/geguvufebimukijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/66087782380.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/rubegifavifi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3475/files/53510194179.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15906675896.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/salow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/kufukupagigerowukezotug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/10944235054.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/vakererexejugixogubimimo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/tufaxepopimasigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/rifts_dimension_book_13.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/97494347618.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/zijedavelubitadamexep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81236671698.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_off00005342.bin
e3ed7cf18d75f3957da13194150e7f9b1561fc4babe058ad6347092df31f969f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5342 5176 bytes
font_01_sfnt_off000064c8.bin
0fc95868d0d0be4357005e033195176569ce824189924a6d4a7968108fa3ed43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C8 9792 bytes

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