Malicious PDF — malware analysis report

Static analysis result for SHA-256 666ef59757d3cd62…

MALICIOUS

PDF

43.4 KB Created: 2020-09-09 13:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07d3bc1de1bed9019020d8db13d14f85 SHA-1: 2cc5791591a5ba8f9d9b444b187d2c2b8de9d1dd SHA-256: 666ef59757d3cd620fb5d8aab6cf072c98be709eb1ebcc7eafdb2a0444421ac1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.me'. It also exhibits characteristics of a PDF link farm, embedding numerous links to other PDF files hosted on Shopify. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves luring users through these links, potentially to a malicious site or to distribute other malware.

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.me/wix?keyword=berklee+performance+center+graham+nash
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2859/4344/files/banjara_movie_punjabi_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/adobe_converter_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/37913347184.pdf
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/haloalkanes_and_haloarenes_class_12_important_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2102/files/ferupimepa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1401/0518/files/analysis_of_transport_phenomena_deen_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/citizen_eco_drive_ladies_watch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/akreditasi_binus_online_learning_teknik_informatika.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/9331099022.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/19133947757.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5010/files/fortitude_valley_shopping_guide.pdf
    • https://static.usrfiles.com/ugd/b0c717_1e91ee0bb3c2493e94ce1df7446a7ca5.pdf
    • https://static.usrfiles.com/ugd/6c032c_3e38eac55c8343fea47f2537b6a80d01.pdf
    • https://static.usrfiles.com/ugd/98e2de_35a02405d2fe4ae8b444f039ca301cd8.pdf
    • https://static.usrfiles.com/ugd/3e9e83_47d8b3d6fc1943e0aac058e270a0cb39.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_off00006b53.bin
fd03407e9ed080e0ff0e9eb3d6266d08a1590f07b09b04cbd6e918428730eeb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B53 5540 bytes
font_01_sfnt_off00007e07.bin
63ccaf3f256420e4f5502c6dff4977ab0aebd7f0e61bf5c04c6e17f79d7b6b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E07 10040 bytes

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