Malicious PDF — malware analysis report

Static analysis result for SHA-256 3598f55aaa7b5ba9…

MALICIOUS

PDF

44.3 KB Created: 2020-08-21 10:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a3d8af537d116d33318e7cbc2b49466 SHA-1: 701f6bce064aa6d22210cefe07461a3821f45b11 SHA-256: 3598f55aaa7b5ba94ea775a2b5e1c21d798bd83906458c613102cfa85529b1eb
128 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 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and other embedded URLs, some of which are hosted on Shopify. The presence of a PDF link farm heuristic further suggests an attempt to distribute malicious content. The primary attack pattern involves luring the user to click the malicious link under the guise of urgent action, likely leading to a second-stage download or exploit.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=criminal+case+game+free
    • http://zurep.forestlakescounseling.com/uploads/1/3/1/8/131872055/mupezojijusepagana.pdf
    • http://files.cbdisus.co.uk/uploads/1/3/0/9/130969312/5666299.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/66628391257.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5829/files/aircraft_structural_maintenance.pdf
    • https://cdn.shopify.com/s/files/1/0438/9437/4555/files/tujonunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/saruzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/azamgarh_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/shell_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/complete_psionic_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/74758223575.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1587/files/domij.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/ladevanuxezakivilove.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_off00006fe0.bin
3f13c9f4b0ac4080fbfc7ab87f0f1ad0bcba4d610ed5ee4cc239e895ae5dbab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE0 5104 bytes
font_01_sfnt_off0000811f.bin
4c340327ee1a49cc12ad00867b248dc9f3e13bb4d25f35364dd90d90ec491f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811F 10428 bytes

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