Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83282874440457f…

MALICIOUS

PDF

95.0 KB Created: 2020-10-10 20:40:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adf6cf735b0b25e0e2947ff4a0a01916 SHA-1: 30750754b53cf95e8dceaf427d95e58df29a742a SHA-256: f83282874440457ff1db3d9079eed2e229e0aa9eee00e70776c4a6809a9149d6
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URLs, such as 'https://gettraff.ru/strik?keyword=%25D8%25B1%25D8%25B3%25D9%2585+%25D9%2583%25D8%25B4+%25D9%2582%25D8%25A7%25D8%25A6%25D9%2585%25D8%25A9', and numerous other PDF links, indicate a likely attempt to lure users to malicious sites. No scripts were extracted, but the structure strongly suggests a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://gettraff.ru/strik?keyword=%25D8%25B1%25D8%25B3%25D9%2585+%25D9%2583%25D8%25B4+%25D9%2582%25D8%25A7%25D8%25A6%25D9%2585%25D8%25A9
    • http://files.tarmanartroom.com/uploads/1/3/2/7/132740553/2838660.pdf
    • http://difalu.juspampered.com/uploads/1/3/1/4/131407355/9fd55f.pdf
    • http://dukuxijo.westportanimalhospital.net/uploads/1/3/0/8/130814416/5158599.pdf
    • http://files.pitzeradventures.com/uploads/1/3/1/4/131438641/bivikopowofijububi.pdf
    • https://site-1036640.mozfiles.com/files/1036640/jukajedugurof.pdf
    • https://site-1038310.mozfiles.com/files/1038310/72545919813.pdf
    • https://site-1039199.mozfiles.com/files/1039199/sexorixobarofo.pdf
    • http://sowuna.teresarobeson.com/uploads/1/3/1/3/131381679/cf807f4b6541f3.pdf
    • http://files.closedherdproducts.com/uploads/1/3/0/7/130775905/598698.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001345e.bin
4ae9c19a93a697f7cf969a6923488fe05ec70da8c5056ac50595ab786d2f2ed9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1345E 32676 bytes
font_00_sfnt_off0000e3d5.bin
2aaf4cfefa03bdd2a51bde57d3b5b1813b031f05da4d465465a6ff83842c0775		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 4068 bytes
font_01_sfnt_off0000f1b3.bin
286ce4ecf705cf2343fe692e46ed2d0574e84ff08ab6061812c18919c6858433		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B3 17552 bytes
font_02_sfnt_off00010be3.bin
3b740895ec2a514dca906dc626bff727e44310efaaf0a27132d19866f84321b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE3 11888 bytes

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