Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbf85c2cd3c8d99…

MALICIOUS

PDF

80.9 KB Created: 2020-08-10 18:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 863684fb50c8a8626e2787fa4ede19da SHA-1: 4eee4a99e1a00c4c347ca536fa9e2256e6a94497 SHA-256: adbf85c2cd3c8d9937e0254d4a6228d3feb9f8b588d426ef6315ad6f8fea6c3f
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.ru. It also exhibits a PDF link farm behavior, with numerous links pointing to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'download button' heuristic further supports the lure mechanism.

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.ru/pify?keyword=types+of+screw+threads+and+their+applications+pdf
    • http://files.dvrgeclothing.ca/uploads/1/3/2/6/132695294/2329e5a732.pdf
    • http://files.ascdmo.org/uploads/1/3/0/9/130969172/vowow.pdf
    • http://files.meaganhesham.ca/uploads/1/3/0/9/130969218/4591974.pdf
    • http://files.motivelove.com/uploads/1/3/1/4/131408056/01a156e67720.pdf
    • https://cdn.shopify.com/s/files/1/0432/2407/2349/files/clinical_data_interpretation_in_anaesthesia_and_intensive_care.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/difobanejosirof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44329390643.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50306279194.pdf
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/rujam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/49165066412.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/awakening_the_giant_within_by_anthony_robbins.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/wilton_drill_presses.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86e.bin
9b455f4d3334776ab7f2db3dff5cf1c43ef3e91a6f04933b605244875d2a24ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 5384 bytes
font_01_sfnt_off0000fad1.bin
16b0974ea4256276fe2e202b8795e1efc1ff91425e12fc5229f1736e45153df8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 11264 bytes
font_02_sfnt_off0001209e.bin
852e0d6ce07a1db2e11154f4548aec4dc29a2cf073112f8b6a2b4be1be4894b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1209E 16172 bytes