Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e82b4e16e1b0957…

MALICIOUS

PDF

37.8 KB Created: 2020-08-20 01:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99d59501271e6621ed2e446ca8033180 SHA-1: 309c96f582fdee22f79d633945236b8889a18f4f SHA-256: 4e82b4e16e1b09571cb597dae4bd9ed1d34225332dbb7b8f7a815ae524d325aa
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to external PDF files hosted on various domains. One critical heuristic identified a malicious redirector link to 'ttraff.com', suggesting a phishing or malicious content delivery attempt. The presence of a link farm indicates an attempt to manipulate search engine results or distribute content through a large number of linked PDFs.

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.com/pify?keyword=writing+instructions+ks2+template
    • http://megozuki.cleanoakland.com/uploads/1/3/1/6/131636648/lisubigivevegagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/8887552309.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/activation_code_generator.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/wemipovojezujolufivexuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/arabic_to_word_converter_software.pdf
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/ballade_chopin_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/43952597243.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/14857809221.pdf
    • https://cdn.shopify.com/s/files/1/0436/9360/5014/files/kitadulet.pdf
    • https://cdn.shopify.com/s/files/1/0436/9347/3947/files/5978326102.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3820/files/busifimiruzamosisinab.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_off000055b7.bin
1c58184009ed55ebb7f180e400596ed9e73c1dacf2a675dd40e8313dadb9568c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B7 5464 bytes
font_01_sfnt_off0000684e.bin
7d8436e8f591daff5ca27cbd970dfbf675dbbc570b3d8c30b83ca20177559985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684E 10060 bytes

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