Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c3536eb50b01658…

MALICIOUS

PDF

69.7 KB Created: 2020-08-19 20:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24442f534dc9687b678d1717727a16f SHA-1: 6b51e456176d5382736dad50f95783395f9a4300 SHA-256: 1c3536eb50b01658ff28cfc4972a9953a47644e007e4a92f92bfdcb885f43496
150 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious sites or downloads. The document body contains text related to 'Mtd chipper shredder engine manual' and the authoring application, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=mtd+chipper+shredder+engine+manual
    • http://files.david-rickard.net/uploads/1/3/1/4/131453543/kexet-favisizigufu.pdf
    • http://files.lynnereeder.com/uploads/1/3/1/4/131436967/3b2c1dfe9.pdf
    • http://files.avillafreedomfestival.com/uploads/1/3/1/4/131406437/kuparolon.pdf
    • http://bomuk.harleydavidsongirls.org/uploads/1/3/0/7/130738779/375171.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/tarukanifivefa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/divaripu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7981/files/8918700110.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ketotojugidumirazi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/metabolism_diet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/cricket_sound_bite.pdf
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/xexirulusawovowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/banoritawikoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42632515291.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/rovaveziwefiwawa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/44637645056.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_off0000c7db.bin
d9adc914ccfcbb73465290d30c97fd423ed98e6816d29cc470ca8259ac486306		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DB 5492 bytes
font_01_sfnt_off0000da5b.bin
118df0441cfbfc1bd958551ec3349f0deb3232a59bfe268a4f96a9b1a06c58dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5B 15396 bytes

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