Malicious PDF — malware analysis report

Static analysis result for SHA-256 445da432eedc5853…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 16:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9de26af0b531c6a4d6d86ca861ec99 SHA-1: d3aac478b8636265006e779aaf6f43c982e75fda SHA-256: 445da432eedc58531c16ba8ae4d1f42af15f7378f4c105707502bcb6290e1728
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=autosketch+program+free'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, including one hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute malicious links broadly. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=autosketch+program+free
    • http://files.greeknificent.com/uploads/1/3/1/6/131606027/lalepoxisodifa_nilosepoluwofe_fotonelubeki.pdf
    • http://files.tombarthaexcavating.com/uploads/1/3/1/4/131408432/napupebefadibakefupa.pdf
    • http://files.casadeartegallery.com/uploads/1/3/1/4/131453615/vekilo.pdf
    • http://files.alaskahistoryday.com/uploads/1/3/2/8/132814958/pusub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/juserofobop.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/minecraft_nuke_mod_1._12._2.pdf
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/8081245275.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/32790782706.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/72986958549.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/31002037418.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/13275287636.pdf
    • https://cdn.shopify.com/s/files/1/0447/9506/8567/files/best_pc_build_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/gekaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/1997846493.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_off00006110.bin
11c9b0ab1314a0fd4cb817ed91a9189223e804fdf0d58251d5ee25279a76fcf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6110 5452 bytes
font_01_sfnt_off0000737d.bin
f9605996f97d0224d5e31569a295fd3e0487d9ba65e70cfc49a666ba6321a5b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737D 11284 bytes

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