Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce30023dd168010…

MALICIOUS

PDF

44.5 KB Created: 2020-08-09 22:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6bf1b361b93a3b69517047ac041fd15 SHA-1: 74ae61565ee95b618ea2a5980e70e28caf943da8 SHA-256: 8ce30023dd168010540647e4a0d9083862fbaefcff5a973c941b91fd591cf598
150 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, disguised as a student bus pass application form. The heuristic firings indicate a malicious redirector and a link farm, suggesting the primary goal is to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=bmtc+student+bus+pass+application+form+pdf
    • http://files.speakoutproject.org/uploads/1/3/1/4/131437119/moperekipeluba.pdf
    • http://files.mtabenefitfund.org/uploads/1/3/1/3/131398129/vofewivevukupuz_toxepozener_rivefukujapul.pdf
    • http://files.preciouscollective.com/uploads/1/3/1/0/131070483/1594021.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/stratified_k_fold.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/giburevigewikitame.pdf
    • https://cdn.shopify.com/s/files/1/0428/3649/2444/files/beladegajosegunovine.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1942/files/bepuwefozejubemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7162/files/manual_drip_coffee_maker.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/85499824740.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/19223983135.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/bodmas_difficult_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/28275754169.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/61601795458.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/punituga.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_off00006fd7.bin
bcb26928fbd2bde22cb41bba599472811a96adcf74857ac4e96a287f278ebccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD7 5492 bytes
font_01_sfnt_off00008266.bin
7ab86300785a62acca61b9824652beb54224c050d7f9b244c59a032e3602707e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8266 10076 bytes

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