Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b4bf5fbeac539e…

MALICIOUS

PDF

39.8 KB Created: 2020-08-20 01:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad62cff0158ad1a4309654f7facb8040 SHA-1: 48b02c0428a3468006405affbddb25cdfb1d825d SHA-256: 33b4bf5fbeac539e21ed0193f39c751778518c95b6149f83c634af1c1a87870d
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.cc, which is designed to lure users into clicking further. The document also exhibits characteristics of a link farm, with numerous embedded links, many hosted on Shopify. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+terminal+emulator+app
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/2920859929.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/brocade_zoning_cli_commands.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/muposaliwovojegomezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/buwafari.pdf
    • http://fudotemo.mgalbraith.people.ua.edu/uploads/1/3/2/6/132695478/pugidaxetinu_gunawiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/after_effects_cs6_shortcut_keys.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/83162401742.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/accenture_digital_transformation_2017.pdf
    • https://cdn.shopify.com/s/files/1/0440/3675/1525/files/bogafogeso.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/6384118092.pdf
    • https://cdn.shopify.com/s/files/1/0436/1352/0029/files/10990503601.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/fazilogenupezomidimugolos.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/48435144928.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_off00005e1d.bin
9b9c6a6e42a41e42428febb8ea5f501f8b7fd76d64a560b6e43ae43a940234e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1D 4916 bytes
font_01_sfnt_off00006eb2.bin
79ddac79df976fa13113ce95caae058e388c31c5f1af29ae98c753f63d0189b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB2 10572 bytes

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