Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fbe3a46feb5e50…

MALICIOUS

PDF

34.1 KB Created: 2020-08-25 11:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1482a4c09db8d443e07438aa4a55986 SHA-1: b922ef6899cb99deec634b0013e241a64e535d4e SHA-256: e7fbe3a46feb5e5058d71969c1c2ab11d3867d0c7c38d471db8716240d6e7a69
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDFs hosted on various domains, including shopify.com and custom domains. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, reinforcing the lure. The primary intent appears to be directing users to malicious infrastructure via the ttraff.com redirector.

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=bracket+chop+kiss+instrumental
    • http://files.csardasedmonton.com/uploads/1/3/1/8/131858791/wisomenumezeburi.pdf
    • http://files.alessandrasulpy.com/uploads/1/3/0/8/130874403/jiwix.pdf
    • http://files.dikaios-legal.com/uploads/1/3/0/7/130775025/wedubol-povidukit.pdf
    • http://pumet.my-lhd.com/uploads/1/3/0/8/130814328/f54d2b7947ed73a.pdf
    • https://cdn.shopify.com/s/files/1/0450/1346/7286/files/angle_addition_postulate_proofs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/wadapizaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0432/6388/5472/files/waterfall_butterfly_live_wallpaper_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/mivitanuvegowos.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7250/files/23562495976.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/tunemobie_spotify_music_converter.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6179/files/validity_and_reliability_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/2766/0951/files/nowafuxadidekesabapis.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/chpn_online_study_guide.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_off00004813.bin
893193f5b7099b3b0df72a2342b1a57c2ba9b7e0584b2e56cc3e521a82d2abf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4813 5284 bytes
font_01_sfnt_off000059dc.bin
3b2982699a8adf0fc0d408336e693c3298bc1737e337f9e47ac02feb120f18e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59DC 9920 bytes

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