Malicious PDF — malware analysis report

Static analysis result for SHA-256 a307ab71f87f9863…

MALICIOUS

PDF

50.1 KB Created: 2020-08-12 09:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04b20b5b19354e5e050190c71b32a641 SHA-1: ca1e794c2dfdce32bc8f96b13bcd3d81720d14b6 SHA-256: a307ab71f87f986384dc4c19895cc5e9403cd13da836df9c4dc6676414331c09
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a worksheet answer key. The ML classifier strongly indicated maliciousness, and the PDF was flagged for linking to known malicious infrastructure. The document body, though heavily corrupted, contains the URL that triggered the malicious redirector heuristic, suggesting the primary goal is to redirect the user to a malicious site.

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/wb?keyword=momentum%20impulse%20and%20momentum%20change%20worksheet%20answers
    • http://files.awarenesscounselingcenter.com/uploads/1/3/1/3/131398246/niguvuvisokorun_jojotin.pdf
    • http://files.ryleemori.com/uploads/1/3/1/4/131483361/9fe45cc853c9fe.pdf
    • http://files.kelljrlonghornsbasketball.com/uploads/1/3/1/3/131383247/muvezobititujodovori.pdf
    • http://files.stpaulsenola.com/uploads/1/3/1/1/131163976/3619147.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5796/files/cleaning_bunn_coffeemaker.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/zemaratelowisega.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/82771497448.pdf
    • https://cdn.shopify.com/s/files/1/0428/4658/4999/files/mokoduxagogopimol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9606/files/squeeze_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/duvadofapuxurimome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/vadagovugat.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/93302182390.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3885/files/39804649020.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_off0000849e.bin
282b5e0dd5a25ff3bd84d5751de0290bf3bf1dcd845b14facdea816d8e54cd30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849E 5648 bytes
font_01_sfnt_off000097be.bin
dc36c6cbb74063cb7137983bb3d96c51f7160c9d89d6cc9f95368540df0182e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BE 10444 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.