Malicious PDF — malware analysis report

Static analysis result for SHA-256 96159868aa8e3c36…

MALICIOUS

PDF

49.9 KB Created: 2020-07-13 20:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e2e62195c1084579a421e6e2969d4d0 SHA-1: 06de2c6987e3b90db5f4b9749628fd5482f228e8 SHA-256: 96159868aa8e3c36374acda28b988157af0d3c095c8c9a6e9c94180316c6cb41
120 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, directing users to `https://ttraff.cc/wb?keyword=ctek%20us%207002%20manual`. Additionally, it exhibits characteristics of a PDF SEO link farm, with 21 embedded links pointing to various PDF files hosted on different domains. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its intended content beyond the lure of a manual. No scripts were extracted from this sample.

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.cc/wb?keyword=ctek%20us%207002%20manual
    • http://files.belllog.org/uploads/1/3/0/7/130775827/2358242.pdf
    • http://files.feedmysheeptemple.org/uploads/1/3/2/7/132740692/6665236.pdf
    • http://files.innerheartpathways.com/uploads/1/3/2/6/132681002/46e9335.pdf
    • http://files.solitaryislandsgamefishingclub.com/uploads/1/3/1/3/131379115/jisobudi.pdf
    • http://files.rockvilleintegrativetherapist.com/uploads/1/3/1/1/131164075/3996584.pdf
    • http://files.grounded-infrastructure.com/uploads/1/3/0/8/130813948/bojinakexada.pdf
    • http://files.crumblesbynicole.com/uploads/1/3/1/3/131380596/3902028.pdf
    • http://files.shinethruaba.com/uploads/1/3/1/6/131637081/ziganivomi.pdf
    • http://files.rockville
    • https://baveriwada345211056.files.wordpress.com/2020/06/nufumefa.pdf
    • https://tejodewawi.files.wordpress.com/2020/07/miwasidudimilasad.pdf
    • https://bunazixuvavu.files.wordpress.com/2020/07/60865230493.pdf
    • https://ralinuze.files.wordpress.com/2020/07/vufotawamufevekila.pdf
    • https://begazajalixu.files.wordpress.com/2020/07/90473292243.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/fedasinirapuzerijawamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bijuwosozawubuvenokuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/76119217888.pdf
    • https://cdn.shopify.com/s/files/1/0430/5446/5175/files/xatutaperutikaxofolemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9273/8201/files/63198688575.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/zadeted.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/juzoxuwedurodowemiledirol.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_off0000859a.bin
b8dfdb3c2478286680c755a721ebe09fbb37d1dc94cfb59642b119b2a0c73194
pdf-font-stream PDF embedded font (sfnt) at offset 0x859A 4900 bytes
font_01_sfnt_off00009638.bin
99408e4879d1384a1502e75ea5df340dc0e3a5ad0bd1260a8becf72b1da8db8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9638 10736 bytes