Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffdc1fb5da9d72e…

MALICIOUS

PDF

62.3 KB Created: 2020-08-30 02:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 036750f2b12d89e3db2a6a6734e4da83 SHA-1: 2361b5ec4a0c78bc3b74693389406308307ffc33 SHA-256: bffdc1fb5da9d72edf747571f1ac8368e1f0a0b08f80a41beebe94249db3a6e1
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. One specific URL, 'https://ttraff.link/wix?keyword=sistemi+di+copertura+piani+in+fibra', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=sistemi+di+copertura+piani+in+fibra
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/gunakimodovupub.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/mataginipakexojojazoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/fafezoferunizutaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/ayurveda_books_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/72971692343.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/ainda_gosto_dela.pdf
    • https://cdn.shopify.com/s/files/1/0429/1418/5372/files/atualizar_media_nav_evolution_android_auto.pdf
    • https://cdn.shopify.com/s/files/1/0430/1389/8403/files/61272837876.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/formal_dinner_dress_code_ideas.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bc87731a82d48708873da3b9bc1b9ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_243f147feec7434e9c15667e088ecd13.pdf
    • https://static.usrfiles.com/ugd/b8c837_8efc84ac797149e7b103bb65430a3f90.pdf
    • https://static.usrfiles.com/ugd/87a178_48d8ac2acfb64a25a07766ad606af624.pdf
    • https://static.usrfiles.com/ugd/7c3584_3a4b998c4d9e4fa09e60b9d963535504.pdf
    • https://static.usrfiles.com/ugd/b50c55_c58d884fc54d4d07871fac3e0f79e807.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_off0000b30c.bin
d04f0a377568d63467eb359cfb9ee8b4c3cbac47ea59b81017b205c3bcb9f6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB30C 5512 bytes
font_01_sfnt_off0000c59d.bin
595eefc3b5b66cacf784603cbdc2492b570500f9b5dbec7997bc5eb91015ba3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC59D 11288 bytes

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