Malicious PDF — malware analysis report

Static analysis result for SHA-256 220b925c5db35800…

MALICIOUS

PDF

47.5 KB Created: 2020-07-09 09:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ef6c5cd196001c8abc7aa5f0204c2f SHA-1: 16db9ae338a05d62f7c22856a69b31b57be93747 SHA-256: 220b925c5db358000186b20ca9b81980975eff2435cfba1749947810fd30d636
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a lure related to a 'Kerala psc police constable exam syllabus 2017 pdf' and includes a link to 'ttraff.ru', which is flagged as a malicious redirector. Additionally, the PDF contains a large number of embedded links, many of which point to domains that appear to be part of a link farm. The document body is heavily obfuscated, but the presence of the malicious redirector and link farm strongly suggests a phishing or malware distribution attempt.

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/wb?keyword=kerala%20psc%20police%20constable%20exam%20syllabus%202017%20pdf
    • http://files.jessicaleighwellbeing.com/uploads/1/3/1/3/131379320/xajojasaripunu.pdf
    • http://files.theamericangurner.com/uploads/1/3/1/4/131437666/753a454f86.pdf
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdf
    • http://files.rocksandthingsmetaphysical.com/uploads/1/3/0/8/130813799/kisusis_loxuminuja_felubadib.pdf
    • http://files.geeftx.com/uploads/1/3/1/3/131382406/kogasitis.pdf
    • http://files.drcarriebrennan.com/uploads/1/3/1/4/131438570/famebawilopew-bixoxunokonori-jaradav-zofegi.pdf
    • http://files.mariecharpentier.net/uploads/1/3/1/4/131483019/batipaxadas.pdf
    • http://files.ginaandthebean.com/uploads/1/3/1/3/131380953/549203.pdf
    • https://sulekes.files.wordpress.com/2020/07/63195737712.pdf
    • https://xopaxutije.files.wordpress.com/2020/06/zisivoravomijo.pdf
    • https://molemekowenu.files.wordpress.com/2020/07/42233176015.pdf
    • https://sujaxogudat.files.wordpress.com/2020/06/lexinegaseza.pdf
    • https://xewugof.files.wordpress.com/2020/07/82961071105.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.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_off0000653e.bin
4432a57fca214e93e426b6d102a5500335f9627c68a489a4ac62eef9beded302		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653E 5868 bytes
font_01_sfnt_off0000792b.bin
1426b86e7d9fdde02fe0f88c74f8ce47d7e3220ccaca483f2279e6d9171c8c51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792B 9896 bytes
font_02_sfnt_off00009b60.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B60 16092 bytes

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